J. Wright Horton, Jr., Ph.D.

Wright Horton is a Research Geologist in the USGS Florence Bascom Geoscience Center. He is an authority on southern and central Appalachian geology, served as co-leader and leader of the USGS Chesapeake Bay Impact Crater Project, explored terranes and basins beneath the Atlantic Coastal Plain, and is involved in eastern U.S. earthquake studies.

Biography

Research Interests

Field and laboratory research on structural geology and tectonics, metamorphic and igneous rocks, impact craters and related materials, fault zones and fault rocks, mountain chains, Appalachian Piedmont and Blue Ridge geology, pre-Cretaceous terranes and buried basins beneath the Atlantic and Gulf coastal plains, intraplate earthquakes, and hydrogeology of fractured crystalline rocks, including geologic mapping, scientific drilling, geologic interpretation of geophysical data, and multidisciplinary collaborations

 

Professional Experience

Research Geologist, U.S. Geological Survey, Reston, Virginia, 1980–present

National Research Council Postdoctoral Associate, U.S. Geological Survey, Reston, Virginia, 1978–80

Assistant Professor of Geology, University of Southern Maine, Portland and Gorham, Maine, 1977–78

 

Education

Ph.D., University of North Carolina at Chapel Hill (Geology), 1977

M.S., University of North Carolina at Chapel Hill (Geology), 1974

B.S., Furman University (Geology), 1972

 
Awards and Honors

STAR Awards, U.S. Geological Survey, 1997, 2003, 2004, 2006, 2011

Superior Service Award, U.S. Department of the Interior, 1997

Elected Fellow, Geological Society of America, 1986

Special Achievement Award, U.S. Geological Survey, 1986

Awarded National Research Council (NRC) Postdoctoral Research Associateship, 1978–80

 

Projects

Task Leader, Central Virginia Seismic Zone Overview and Synthesis task of USGS Geologic Framework for Seismic Hazards in Central Virginia and the Eastern U.S. Project, 2014–present

Coastal Basement Task Leader, USGS Geology of Atlantic Watersheds Project, 2008–2014

Project Leader (2007–2008) and Co-leader (2004–2007), USGS Chesapeake Bay Impact Crater Project

Cooperating Principal Investigator, ICDP-USGS Chesapeake Bay Impact Structure Deep Drilling Project, 2004–2009

Co-leader, Crater Materials Science Team, ICDP-USGS Chesapeake Bay Impact Structure Deep Drilling Project, 2004–2009

Task Co-leader, USGS Chesapeake Bay Impact Crater Project, 2000–2004

Task Co-leader, Hydrogeologic framework of the Piedmont and Blue Ridge, North Carolina task of USGS Bedrock Regional Aquifer Systematics Study (BRASS) Project, 2000–2005

Staff Scientist, USGS Office of Eastern Regional Geology (2002)

Task Leader, Geology of the Washington-Baltimore Urban Area task of USGS Appalachian Regional Geology and Hydrology Project, 1998–2002

Project Chief, USGS Geology of the Mid-Atlantic Urban Corridor (GOMAC) Project, 1995–98

Project Chief, USGS Geology of the South-Central Virginia Piedmont Project, 1991–95

Assistant Branch Chief, USGS Branch of Eastern Regional Geology, 1984–85

Project Chief, USGS Raleigh Belt and Eastern Slate Belt Project, 1983–91

Geologic mapping, USGS projects in Charlotte (NC-SC) and Greenville (SC-GA) 1° × 2° quadrangles, 1980-89

 

Scientific Editor (Books)

The 2011 Mineral, Virginia, Earthquake and Its Significance for Seismic Hazards in Eastern North America, Geological Society of America Special Paper 509, edited by J.W. Horton Jr., M.C. Chapman, and R.A. Green, 2015

The Sedimentary Record of Meteorite Impacts, Geological Society of America Special Paper 437, edited by K.R. Evans, J.W. Horton Jr., D.T. King Jr., and J.R. Morrow, 2008

Studies of the Chesapeake Bay impact structure—The USGS-NASA Langley corehole, Hampton, Virginia, and related coreholes and geophysical surveys, U.S. Geological Survey Professional Paper 1688, edited by J.W. Horton Jr., D.S. Powers, and G.S. Gohn, 2005

Forum on Geologic Mapping Applications in the Washington-Baltimore Urban Area, U.S. Geological Survey Circular 1148, edited by J.W. Horton Jr., and E.T. Cleaves, 1997

The Geology of the Carolinas, Carolina Geological Society Fiftieth Anniversary Volume, University of Tennessee Press, edited by J.W. Horton Jr. and V.A. Zullo, 1991

Mélanges and Olistostromes of the U.S. Appalachians, Geological Society of America Special Paper 228, edited by J.W. Horton Jr. and N. Rast, 1989

 

Editorial Boards

Associate Editor, Geological Society of America Bulletin, 1988–90 and 1991–93

Editorial Board, South Carolina Geology, 1989-97

 

Committees and Review Panels

Co-leader, USGS Science Coordination Team for Virginia Earthquake Studies, 2011-2016

Science Review Committee, Barringer Family Fund for Meteorite Impact Research, 2015-2017

NAGT-USGS Internship Review Panel, 2011

USGS Ad Hoc Committee on Research Priorities following the Virginia Earthquake Sequence, 2011

Argon Geochronology Laboratory Advisory Committee, USGS Geology Discipline, 2006–07

Organizing Committee for ICDP-USGS Workshop on Deep Drilling in the Central Crater of the Chesapeake Bay Impact Structure, Virginia, USA, Herndon, VA, 2003

Co-chair, Science Language Technical Team Subgroup on Metamorphic Rocks, North American Geologic Map Data Model (NAGDM), 2001–04

Membership Committee, Geological Society of America, 2000–03

Eastern Region Publications Steering Committee member, USGS Geologic Division, 1998

Publications Committee, Geological Society of America, 1993–95

U.S. National Committee for IGCP Project 233, Terranes in the Circum-Atlantic Paleozoic Orogens, 1986–91

Science Advisory Committee, USGS Geologic Division, 1988–90

Committee on Penrose Conferences, Geological Society of America, 1983–85

North Carolina State Geologic Map Advisory Committee, 1983–85

Working Group E4 of Geodynamics Continental-Ocean Transects Program, 1982–87

 

Organizing Conferences and Special Sessions

Co-convener of Theme Session, Seismic Zones, Paleoseismology, and Neotectonics in the Southeastern United States, Geological Society of America Southeastern Section Meeting, 2017.

Co-convener of Topical Session, Evidence for Neotectonic Earthquakes and Their Driving Mechanisms in the Intraplate Region of Central and Eastern North America, Geological Society of America Annual Meeting, 2016.

Co-convener of Topical Session, Intraplate Earthquakes, Seismotectonics, and Geodynamics in Eastern and Central North America, Geological Society of America Annual Meeting, 2015.

Co-convener of Topical Session, Magnetic Surveys for Imaging the Geology of Earth and Other Planetary Bodies: A Session Honoring the Legacy of Isidore Zietz, Geological Society of America Annual Meeting, 2014

Co-convener of Theme Session, Lessons Learned from the 2011 Virginia Earthquake, Geological Society of America Southeastern Section Meeting, 2014.

Co-convener of Topical Session, Central Virginia Earthquakes of 2011: Geology, Geophysics, and Significance for Seismic Hazards in Eastern North America, Geological Society of America Annual Meeting, 2012.

Co-convener of Topical Session, Exploring Subsurface Terranes and Buried Basins of Eastern and Central North America - Geology, Geophysics, and Geochronology, Geological Society of America Annual Meeting, 2011

Co-convener of Topical Session, Tectonic Significance of Buried Terranes of the Atlantic and Gulf Coastal Plains, Geological Society of America Northeastern/Southeastern Sections Meeting, 2010

Technical Program Co-chair, Geological Society of America Northeastern/Southeastern Sections Joint Meeting, 2010

Co-convener of Symposium, Drilling of Impact Structures, Conference on Large Meteorite Impacts and Planetary Evolution IV, Vredefort Dome, South Africa, 2008

Co-convener of Symposium, The Chesapeake Bay Impact Structure: Formation and Consequences, American Association for the Advancement of Science Annual Meeting, 2005

Co-convener of SEPM Research Conference, The Sedimentary Record of Meteorite Impacts, 2005

Co-convener of Topical Session, Peri-Gondwanan Terranes of the Appalachians, Geological Society of America Northeastern/Southeastern Sections Meeting, 2004

Co-convener, Forum on Geologic Mapping Applications in the Washington-Baltimore Urban Area, sponsored by U.S. Geological Survey and Maryland Geological Survey, 1997

 
Professional Organizations 
American Association for the Advancement of Science, American Geophysical Union, Carolina Geological Society (President, 1981–82), Geological Society of America (Fellow), Geological Society of Washington (Council Member, 2009–10), Impact Field Studies Group, Planetary Crater Consortium (formerly Mars Crater Consortium), Meteoritical Society, Sigma Xi - The Scientific Research Society, SEPM (Society for Sedimentary Geology)
 

Publications

Harrison, R.W., Schindler, J.S., Pavich, M.J., Horton, J.W., Jr., and Carter, M.W., 2016, Centimeter-scale surface deformation caused by the 2011 Mineral, Virginia, earthquake sequence at the Carter farm site—Subsidiary structures with a Quaternary history: U.S. Geological Survey Open-File Report 2016–1134, 18 p. https://pubs.er.usgs.gov/publication/ofr20161134

Horton, J.W., Jr., Owens, B.E., Hackley, P.C., Burton, W.C., Sacks, P.E., and Hibbard, J.P., 2016, Geology of the Eastern Piedmont in Virginia, in Bailey, C.M., Sherwood, W.C., Eaton, L.S., and Powars, D.S., eds., The Geology of Virginia: Martinsville, Virginia Museum of Natural History, Special Publication 18, p. 125-158, ISBN: 1-884549-40-3.

Hibbard, J.P, Beard, J.S., Henika, W.S., and Horton, J.W., Jr., 2016, Geology of the Western Piedmont in Virginia, in Bailey, C.M., Sherwood, W.C., Eaton, L.S., and Powars, D.S., eds., The Geology of Virginia: Martinsville, Virginia Museum of Natural History, Special Publication 18, p. 87-124, ISBN: 1-884549-40-3.

Jackson, J.C., Horton, J.W., Jr., Chou, I.-M., and Belkin, H.E., 2016, Coesite in suevites from the Chesapeake Bay impact structure: Meteoritics and Planetary Science, v. 51, no. 5, p. 946-965, doi: 10.1111/maps.12638>.

Powars, D.S., Edwards, L.E., Gohn, G.S., and Horton, J.W., Jr., 2015, The Chesapeake Bay impact structure: U.S. Geological Survey Fact Sheet 2015–3071, 2 p. https://pubs.er.usgs.gov/publication/fs20153071

Horton, J.W., Jr., Chapman, M.C., and Green, R.A., 2015, The 2011 Mineral, Virginia, earthquake, and its significance for seismic hazards in eastern North America—Overview and synthesis, in Horton, J.W., Jr., Chapman, M.C., and Green, R.A., eds., The 2011 Mineral, Virginia, Earthquake, and Its Significance for Seismic Hazards in Eastern North America: Geological Society of America Special Paper 509, p. 1-25, doi:10.1130/2015.2509(01).

Powars, D.S., Catchings, R.D., Horton, J.W. Jr., Schindler, J.S., and Pavich, M.J., 2015, Stafford fault system: 120 million year fault movement history of northern Virginia, in Horton, J.W., Jr., Chapman, M.C., and Green, R.A., eds., The 2011 Mineral, Virginia, Earthquake, and Its Significance for Seismic Hazards in Eastern North America: Geological Society of America Special Paper 509, p. 407-431, doi:10.1130/2015.2509(23).

Shah, A.K., Horton, J.W. Jr., Burton, W.C., Spears, D.B., and Gilmer, A.K., 2015, Subsurface geologic features of the 2011 central Virginia earthquakes revealed by airborne geophysics, in Horton, J.W., Jr., Chapman, M.C., and Green, R.A., eds., The 2011 Mineral, Virginia, Earthquake, and Its Significance for Seismic Hazards in Eastern North America: Geological Society of America Special Paper 509, p. 295-304, doi:10.1130/2015.2509(17).

Pratt, T.L., Horton, J.W. Jr., Spears, D.B., Gilmer, A.K., and McNamara, D.E., 2015, The 2011 Virginia Mw5.8 earthquake: Insights from seismic reflection imaging into influence of older structures on eastern U.S. seismicity, in Horton, J.W., Jr., Chapman, M.C., and Green, R.A., eds., The 2011 Mineral, Virginia, Earthquake, and Its Significance for Seismic Hazards in Eastern North America: Geological Society of America Special Paper 509, p. 285-294, doi:10.1130/2015.2509(16).

Horton, J.W., Jr., Shah, A.K., McNamara, D.E., Snyder, S.L., and Carter, A.M., 2015, Aftershocks illuminate the 2011 Mineral, Virginia, earthquake causative fault zone and nearby active faults, in Horton, J.W., Jr., Chapman, M.C., and Green, R.A., eds., The 2011 Mineral, Virginia, Earthquake, and Its Significance for Seismic Hazards in Eastern North America: Geological Society of America Special Paper 509, p. 253-271, doi:10.1130/2015.2509(14).

Shah, A.K., and Horton, J.W., Jr., 2014, Airborne geophysical surveys over the 2011 Mw5.8 Mineral, Virginia earthquake area: background information and first research results, in Shah, A.K., 2014, Airborne Geophysical Surveys over the 2011 Mineral, Virginia Earthquake Area: U.S. Geological Survey ScienceBase, Background Information and Analysis Results, 5 p., doi: 10.5066/F78K773V. [Link]

Steltenpohl, M.G., Horton, J.W., Jr., Hatcher, R.D., Jr., Zietz, I., Daniels, D.L., and Higgins, M.W., 2013, Upper crustal structure of Alabama from regional magnetic and gravity data: Using geology to interpret geophysics, and vice versa: Geosphere, v. 9, no. 4, p. 1044-1064, doi: 10.1130/GES00703.1.

Horton, J.W., Jr., 2012, Learning from the 2011 Virginia Earthquake, in Public Briefing on Faults in the East – New Madrid Seismic Zone and Recent Virginia Earthquake – Understanding Risks, March 29, 2012, Rayburn House Office Building, Washington, DC, 23 slides. [Link]

Cockell, C.S., Voytek, M.A., Gronstal, A.L., Finster, K., Kirshtein, J.D., Howard, K., Reitner, J., Gohn, G.S., Sanford, W.E., Horton, J.W., Jr., Kallmeyer, J., Kelly, L., and Powars, D.S., 2012, Impact disruption and recovery of the deep subsurface biosphere: Astrobiology, v. 12, no. 3, p. 231-246, doi: 10.1089/ast.2011.0722.

Horton, J.W., Jr., and Williams, R.A., 2012, The 2011 Virginia earthquake: What are scientists learning?: EOS Transactions, American Geophysical Union, v. 93, no. 33, p. 317-318. [Link]

Jackson, J.C., Horton, J.W., Jr., Chou, I-M., and Belkin, H.E., 2011, Monoclinic tridymite in clast-rich impact melt rock from the Chesapeake Bay impact structure: American Mineralogist, v. 96, p. 81-88.

Horton, J.W., Jr., Daniels, D.L., Powars, D.S., and Kunk, M.J., 2011, Exploring pre-Cretaceous terranes and basins beneath the Atlantic Coastal Plain: Implications for rift initiation and evolution: EarthScope – GeoPRISMS Science Workshop for Eastern North America, Bethlehem, PA, Oct. 27-29, 2011, 14 slides. [Link]

Cannon, W.F., Schulz, K.J., Horton, J.W., Jr., and Kring, D.A., 2010, The Sudbury impact layer in the Paleoproterozoic iron ranges of northern Michigan, USA: Geological Society of America Bulletin, v. 122, no. 1/2, p. 50-75.

Edwards, L.E., Powars, D.S., Horton, J.W., Jr., Gohn, G.S., Self-Trail, J.M., and Litwin, R.J., 2010, Inside the crater, outside the crater: Stratigraphic details of the margin of the Chesapeake Bay impact structure, Virginia, USA, in Gibson, R.L., and Reimold, W.U., eds., Large Meteorite Impacts and Planetary Evolution IV: Geological Society of America Special Paper 465, p. 319-393.

Steltenpohl, M.G., Zietz, I., Horton, J.W., Jr., and Daniels, D.L., 2010, New York–Alabama lineament: A buried right-slip fault bordering the Appalachians and mid-continent North America: Geology, v. 38, no. 6, p. 571-574.

Horton, J.W., Jr., Aleinikoff, J.N., Drake, A.A., Jr., and Fanning, C.M., 2010, Ordovician volcanic-arc terrane in the Central Appalachian Piedmont of Maryland and Virginia: SHRIMP U-Pb geochronology, field relations, and tectonic significance, in Tollo, R.P., Bartholomew, M.J., Hibbard, J.P., and Karabinos, P.M., eds., From Rodinia to Pangea: The Lithotectonic Record of the Appalachian Region: Geological Society of America Memoir 206, p. 621-660.

Bartosova, K., Gier, S., Horton., J.W., Jr., Koeberl, C., Mader, D., and Dypvik., H., 2010, Petrography, mineralogy, and geochemistry of deep gravelly sands in the Eyreville B core, Chesapeake Bay impact structure: Meteoritics and Planetary Science, v. 45, no. 6, p. 1021-1052.

Horton, J.W., Jr., Gibson, R.L., Reimold, W.U., Wittmann, A., Gohn, G.S., and Edwards, L.E., 2009, Geologic columns for the ICDP-USGS Eyreville B core, Chesapeake Bay impact structure: Impactites and crystalline rocks, 1766 to 1096 m depth, in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 21-49.

Powars, D.S., Catchings, R.D., Goldman, M.R., Gohn, G.S., Horton, J.W., Jr., Edwards, L.E., Rymer, M.J., and Gandhok, G., 2009, High-resolution seismic-reflection images across the ICDP-USGS Eyreville deep drilling site, Chesapeake Bay impact structure, in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 209-233.

Gibson, R.L., Townsend, G.N., Horton, J.W., Jr., and Reimold, W.U., 2009, Pre-impact tectonothermal evolution of the crystalline basement-derived rocks in the ICDP-USGS Eyreville B core, Chesapeake Bay impact structure, in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 235-254.

Townsend, G.N., Gibson, R.L., Horton, J.W., Jr., Reimold, W.U., Schmitt, R.T., and Bartosova, K., 2009, Petrographic and geochemical comparisons between the lower crystalline basement-derived section and the granite megablock and amphibolite megablock of the Eyreville B core, Chesapeake Bay impact structure, USA, in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 255-275.

Horton, J.W., Jr., Kunk, M.J., Belkin, H.E., Aleinikoff, J.N., Jackson, J.C., and Chou, I-M., 2009, Evolution of crystalline target rocks and impactites in the Chesapeake Bay impact structure, ICDP-USGS Eyreville B core, in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 277-316.

Belkin, H.E., and Horton, J.W., Jr., 2009, Silicate glasses and sulfide melts in the ICDP-USGS Eyreville B core, Chesapeake Bay impact structure, Virginia, USA, in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 447-468.

Declercq, J., Dypvik, H., Aagaard, P., Jahren, J., Ferrell, R.E., Jr., and Horton, J.W., Jr., 2009, Experimental alteration of artificial and natural impact melt rock from the Chesapeake Bay impact structure,in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 559-569.

Ormö, J., Sturkell, E., Horton, J.W., Jr., Powars, D.S., and Edwards, L.E., 2009, Comparison of clast frequency and size in the resurge deposits at the Chesapeake Bay impact structure (Eyreville A and Langley cores): Clues to the resurge process, in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 617-632.

Malinconico, M.L., Sanford, W.E., and Horton, J.W., Jr., 2009, Post-impact heat conduction and compaction-driven fluid flow in the Chesapeake Bay impact structure based on downhole vitrinite reflectance data, ICDP-USGS Eyreville deep core holes and Cape Charles test holes, in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 905-930.

Cockell, C.S., Gronstal, A.L., Voytek, M.A., Kirshtein, J.D., Finster, K., Sanford, W.E., Glamoclija, M., Gohn, G.S., Powars, D.S., and Horton, J.W., Jr., 2009, Microbial abundance in the deep subsurface of the Chesapeake Bay impact crater: Relationship to lithology and impact processes, in Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., eds., The ICDP-USGS Deep Drilling Project in the Chesapeake Bay Impact Structure: Results from the Eyreville Core Holes: Geological Society of America Special Paper 458, p. 941-950.

Horton, J.W., Jr., 2008, Geologic map of the Kings Mountain and Grover quadrangles, Cleveland and Gaston Counties, North Carolina, and Cherokee and York Counties, South Carolina: U.S. Geological Survey Scientific Investigations Map 2981, 1 sheet, scale 1:24,000, with 15 p. pamphlet. [Link]

Gohn, G.S., Koeberl, C., Miller, K.G., Reimold, W.U., Browning, J.V., Cockell, C.S., Horton, J.W., Jr., Kenkmann, T., Kulpecz, A.A., Powars, D.S., Sanford, W.E., and Voytek, M.A., 2008, Deep drilling into the Chesapeake Bay impact structure: Science, v. 320, no. 5884, p. 1740-1745.

Gohn, G.S., Koeberl, C., Miller, K.G., Reimold, W.U., Browning, J.V., Cockell, C.S., Horton, J.W. Jr., Kenkmann, T., Kulpecz, A.A., Powars, D.S., Sanford, W.E., and Voytek, M.A., 2008, Supporting online material for Deep drilling into the Chesapeake Bay impact structure, Published 27 June 2008, Science 320, 1740 (2008), 9 p.

Catchings, R.D., Powars, D.S., Gohn, G.S., Horton, J.W., Jr., Goldman, M.R., and Hole, J.A., 2008, Anatomy of the Chesapeake Bay impact structure revealed by seismic imaging, Delmarva Peninsula, Virginia, USA: Journal of Geophysical Research, Solid Earth, v. 113, B08413, 23 p.

Horton, J.W., Jr., Gohn, G.S., Powars, D.S., and Edwards, L.E., 2008, Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA, in Evans, K., Horton, J.W., Jr., King, D.T., Jr., and Morrow, J.R., eds., The Sedimentary Record of Meteorite Impacts: Geological Society of America Special Paper 437, p. 73-97.

Evans, K., Horton, J.W., Jr., King, D.T., Jr., and Morrow, J.R., eds., 2008, The Sedimentary Record of Meteorite Impacts: Boulder, Colorado, Geological Society of America Special Paper 437, 213 p.

Gohn, Gregory S.; Sanford, Ward E.; Powars, David S.; Horton, J. Wright, Jr.; Edwards, Lucy E.; Morin, Roger H.; Self-Trail, Jean M., 2007. Site Report for USGS Test Holes Drilled at Cape Charles, Northampton County, Virginia, in 2004. Geological Survey (U.S.) Open-File Report 2007-1094, v, 22 p. [Link]

Hackley, P.C., Peper, J.D., Burton, W.C., and Horton, J.W., Jr., 2007, Northward extension of Carolina slate belt stratigraphy and structure, south-central Virginia: Results from geologic mapping: American Journal of Science, v. 307, no. 4, p. 749-771.

Horton, J. Wright, Jr., 2006. Geologic map of the Kings Mountain and Grover quadrangles, Cleveland and Gaston Counties, North Carolina, and Cherokee and York Counties, South Carolina. Open-File Report 2006-1238, 1 map sheet, scale 1:24,000, 60 x 35.5 in.; pamphlet, 17 p. [Link]

Horton, J.W., Jr., and Geddes, D.J., Jr., 2006, Geologic map of the upper Wolf Island Creek watershed, Reidsville area, Rockingham County, North Carolina: U.S. Geological Survey Scientific Investigations Map 2871, version 1.0, scale 1:24,000, 1 sheet with 17 p. text and database, CD-ROM. [Link]

Gohn, G.S., Koeberl, C., Miller, K.G., and Reimold, W.U., and the Scientific Staff of the Chesapeake Bay Impact Structure Drilling Project, 2006, Chesapeake Bay Impact Structure Deep Drilling Project completes coring: Scientific Drilling, no. 3, p. 34-37. http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:10420/component/escidoc:10418/Sci.Drill.No.3_34-37.pdf

Gohn, G.S., Koeberl, C., Miller, K.G. ,Reimold, W.U., Cockell, C.S., Horton, J.W., Jr., Sanford, W.E., and Voytek, M.A., 2006, Chesapeake Bay impact structure drilled: EOS Transactions, American Geophysical Union, v. 87, no. 35, p. 349, 355.

Horton, J.W., Jr., Ormö, J., Powars, D.S., and Gohn, G.S., 2006, Chesapeake Bay impact structure: Morphology, crater fill, and relevance for impact structures on Mars: Meteoritics and Planetary Science, v. 41, no. 10, p. 1613-1624.

Jackson, J.C., Horton, J.W., Jr., Chou, I., and Belkin, H.E., 2006, A shock-induced polymorph of anatase and rutile from the Chesapeake Bay impact structure, Virginia, U.S.A.: The American Mineralogist, v. 91, p. 604-608.

Lee, S.R., Horton, J.W., Jr., and Walker, R.W., 2006, Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA—Evidence from osmium isotopic and PGE systematics: Meteoritics and Planetary Science, v. 41, no. 3, p. 819-833.

Horton, J.W., Jr., and Evans, K.R., 2006, SEPM Research Conference Report: The Sedimentary Record of Meteorite Impacts, May 21-23, 2005, Springfield, Missouri: SEPM (Society for Sedimentary Geology), 8 p.

Horton, J.W., Jr., Powars, D.S., and Gohn, G.S., eds., 2005, Studies of the Chesapeake Bay impact structure—The USGS-NASA Langley corehole, Hampton, Virginia, and related coreholes and geophysical surveys: U.S. Geological Survey Professional Paper 1688-A-K, separately paginated, 453 p., 2 oversize figures. https://pubs.usgs.gov/pp/2005/1688/ak/

Mixon, Robert B.; Pavlides, Louis; Horton, J. Wright, Jr.; Powars, David S.; Schindler, J. Stephen, 2005. Geologic Map of the Stafford Quadrangle, Stafford County, Virginia. Geological Survey (U.S.) Scientific Investigations Map 2841, 1 map, scale 1:24,000: col. ; 58 x 46 cm., on sheet 89 x 144 cm., folded in envelope 30 x 24 cm. https://pubs.usgs.gov/sim/2005/2841/

Horton, J.W., Jr., and Izett, G.A., 2005, Crystalline-rock ejecta and shocked minerals of the Chesapeake Bay impact structure, USGS-NASA Langley core, Hampton, Virginia, with supplemental constraints on the age of impact, chap. E of Horton, J.W., Jr., Powars, D.S., and Gohn, G.S., eds., Studies of the Chesapeake Bay impact structure—The USGS-NASA Langley corehole, Hampton, Virginia, and related coreholes and geophysical surveys: U.S. Geological Survey Professional Paper 1688, p. E1-E30. https://pubs.usgs.gov/pp/2005/1688/ak/

Horton, J.W., Jr., Aleinikoff, J.N., Kunk, M.J., Naeser, C.W., and Naeser, N.D., 2005, Petrography, structure, age, and thermal history of granitic Coastal Plain basement in the Chesapeake Bay impact structure, USGS-NASA Langley core, Hampton, Virginia, chap. B of Horton, J.W., Jr., Powars, D.S., and Gohn, G.S., eds., Studies of the Chesapeake Bay impact structure—The USGS-NASA Langley corehole, Hampton, Virginia, and related coreholes and geophysical surveys: U.S. Geological Survey Professional Paper 1688, p. B1-B29. https://pubs.usgs.gov/pp/2005/1688/ak/

Horton, J.W., Jr., Powars, D.S., and Gohn, G.S., 2005, Studies of the Chesapeake Bay impact structure—Introduction and discussion, chap. A of Horton, J.W., Jr., Powars, D.S., and Gohn, G.S., eds., Studies of the Chesapeake Bay impact structure—The USGS-NASA Langley corehole, Hampton, Virginia, and related coreholes and geophysical surveys: U.S. Geological Survey Professional Paper 1688, p. A1-A24. https://pubs.usgs.gov/pp/2005/1688/ak/

Evans, K.R., Horton, J.W., Jr., Thompson, M.F., and Warme, J.E., eds., 2005, SEPM Research Conference: The Sedimentary Record of Meteorite Impacts, Springfield, Missouri, May 21-23, 2005, Abstracts with Program, 35 p. [Link]

Evans, K.R., Horton, J.W., Jr., Thompson, M.F., and Warme, J.E., 2005, The Sedimentary Record of Meteorite Impacts: An SEPM Research Conference: The Sedimentary Record, v.3, no. 1, p. 4-9. [Link]

Horton, J.W., Jr., Aleinikoff, J.N., Kunk, M.J., Gohn, G.S., Edwards, L.E., Self-Trail, J.M., Powars, D.S., and Izett, G.A., 2005, Recent research on the Chesapeake Bay impact structure, USA—Impact debris and reworked ejecta, in Kenkmann, T., Hörz, F., and Deutsch, A., eds., Large meteorite impacts III: Geological Society of America Special Paper 384, p. 147-170.

Edwards, L.E., Horton, J.W., Jr., and Gohn, G.S., compilers, 2004, ICDP-USGS Workshop on Deep Drilling in the Central Crater of the Chesapeake Bay Impact Structure, Virginia, USA, September 22-24, 2003: Proceedings Volume: U.S. Geological Survey Open-File Report 2004-1016, 85 p., CD-ROM. [Link]

Sanford W.E., Gohn, G.S., Powars, D.S., Horton, J.W., Jr., Edwards, L.E., Self-Trail, J.M., and Morin, R.H., 2004, Drilling the central crater of the Chesapeake Bay impact structure: A first look: EOS Transactions, American Geophysical Union, v. 85, p. 369, 377.

Aleinikoff, J.N., Horton, J.W., Jr., Drake, A.A., Jr., Wintsch, R.R., Fanning, C.M., and Yi, K., 2004, Deciphering multiple Mesoproterozoic and Paleozoic events recorded in zircon and titanite from the Baltimore Gneiss, Maryland: SEM imaging, SHRIMP U-Pb geochronology, and EMP analysis, in Tollo, R.P., Corriveau, L., McLelland, J., and Bartholomew, M.J., eds., Proterozoic tectonic evolution of the Grenville orogen in eastern North America: Geological Society of America Memoir 197, p. 411-434.

North American Geologic-Map Data Model Science-Language Technical Team, 2004, Report on progress to develop a North American science-language standard for digital geologic-map databases; Appendix B – Classification of metamorphic and other composite-genesis rocks, including hydrothermally altered, impact-metamorphic, mylonitic, and cataclastic rocks, Version 1.0 (12/18/2004), in Soller, D.R., ed., Digital Mapping Techniques ’04—Workshop Proceedings: U.S. Geological Survey Open-File Report 2004-1451, 56 p. [Link]

North American Geologic-Map Data Model Science-Language Technical Team, 2004, Report on Progress to develop a North American Science-Language Standard for Digital Geologic-Map Databases, in Soller, D.R., ed., Digital Mapping Techniques ’04 Workshop Proceedings—May 16-19, Portland, Oregon: U.S. Geological Survey Open-File Report 2004-1451, p. 85-94. [Link]

Horton, J.W., Jr., Koeberl, C., Reimold, W.U., Aleinikoff, J.N., Gohn, G.S., Izett, G.A., Kunk, M.J., Naeser, C.W., Naeser, N.D., Poag, C.W., and Powars D.S., 2004, Review of petrography, geochemistry, and geochronology—Chesapeake Bay crater, in Edwards, L.E., Horton, J.W., Jr., and Gohn, G.S., compilers, ICDP-USGS Workshop on Deep Drilling in the Central Crater of the Chesapeake Bay Impact Structure, Virginia, USA: Proceedings Volume: U.S. Geological Survey Open-File Report 2004-1016, CD-ROM version only, Powerpoint presentation 33 slides and explanatory notes [3 Mb].

North American Geologic-Map Data Model Science-Language Technical Team, 2003, Science Language for Geologic-Map Databases in North America: A Progress Report, in Soller, D.R., ed., Digital Mapping Techniques ‘03—Workshop Proceedings: U.S. Geological Survey Open-File Report 03–471, p. 109-138. [Link]

Aleinikoff, J.N., Horton, J.W., Jr., Drake, A.A., Jr., and Fanning, C.M., 2002, SHRIMP and Conventional U-Pb ages of Ordovician granites and tonalities in the central Appalachian Piedmont; Implications for Paleozoic tectonic events: American Journal of Science, v. 302, no. 1, p. 50-75.

Horton, J.W., Jr., and Dicken, C.L., 2001, Preliminary geologic map of the Appalachian Piedmont and Blue Ridge, South Carolina segment: U.S. Geological Survey Open-File Report 01-298, scale 1:500,000, one CD-ROM. [Link]

Peper, John D.; McCartan, Lucy B.; Horton, J. Wright, Jr.; Reddy, James E., 2001. Preliminary lithogeochemical map showing near-surface rock types in the Chesapeake Bay watershed, Virginia and Maryland. U.S. Geological Survey Open-File Report 2001-187, scale 1:500,000, 1 over-size sheet and explantory text. [Link]

Powars, D.S., Bruce, T.S., Bybell, L.M., Cronin, T.M., Edwards, L.E., Frederiksen, N.O., Gohn, G.S., Horton, J.W., Jr., Izett, G.A., Johnson, G.H., Levine, J.S., McFarland, E.R., Poag, C.W., Quick, J.E., Schindler, J.S., Self-Trail, J.M., Smith, M.J., Stamm, R.G., and Weems, R.E., 2001, Preliminary geologic summary for the USGS-NASA Langley corehole, Hampton, Virginia: U.S. Geological Survey Open-File Report 01-87-B, 20 p. [Link]

Horton, J.W., Jr., and Daniels, D.L., 1999, Applications of aerial gamma-ray spectrometric and magnetic surveys in geologic mapping—A case study in Southern Virginia and Northern North Carolina, inSacks, P.E., ed., Geology of the Fall Zone region along the North Carolina – Virginia State line—Guidebook for the 1999 meeting of the Carolina Geological Society, Emporia, Virginia, p. 29-36. [Link]

Nelson, A.E., Horton, J.W., Jr., and Clarke, J.W., 1998, Geologic map of the Greenville 1o × 2o quadrangle, South Carolina, Georgia, and North Carolina: U.S. Geological Survey Miscellaneous Investigations Map I-2175, scale 1:250,000, 2 sheets and interpretive pamphlet, 12 p. https://pubs.er.usgs.gov/publication/i2175

Horton, J.W., Jr., 1998, Geology of the Mid-Atlantic Corridor (GOMAC), A project of the National Cooperative Geologic Mapping Program: U.S. Geological Survey Fact Sheet FS-184-97, 4 p. [Link]

McCartan, Lucy, Peper, J.D., Bachman, L.J., and Horton, J.W., Jr., 1998, Application of geologic map information to water quality issues in the southern part of the Chesapeake Bay watershed, Maryland and Virginia, eastern United States, in Gough, L.P., and Marsh, S.P., ed., Fourth International Symposium on Environmental Geochemistry: Journal of Geochemical Exploration, v. 64, no. 1-3, p. 355-376.

Horton, J.W., Jr., and Cleaves, E.T., eds., 1997, Forum on geologic mapping applications in the Washington-Baltimore urban area—Proceedings: U.S. Geological Survey Circular 1148, 46 p. [Link]

West, T.E., Jr., and Horton, J.W., Jr., 1997, Geologic map of the Gaffney 7.5-minute quadrangle, Cherokee County, South Carolina: South Carolina Department of Natural Resources, Geological Survey, EDMAP Quadrangle Map EQM-2, scale 1:24,000, 1 sheet.

Horton, J.W., Jr., and Cleaves, E.T., 1997, Responding to users' needs for geologic information—Washington-Baltimore area, in Horton, J.W., Jr., and Cleaves, E.T., eds., Forum on Geologic mapping applications in the Washington-Baltimore urban area—Proceedings: U.S. Geological Survey Circular 1148, p. 29. [Link]

Horton, J.W., Jr., Jacobson, P.T., Riddle, D.J., and Smith, Sean, 1997, Panel 4. Natural and induced hazards—Avoidance and remediation, in Horton, J.W., Jr., and Cleaves, E.T., eds., Forum on Geologic mapping applications in the Washington-Baltimore urban area—Proceedings: U.S. Geological Survey Circular 1148, pp.13-15. [Link]

Horton, J.W., Jr., Blackburn, A.C., Carroll, T.E., and Martin, A.D., 1997, Panel 3. Geologic information for the urban system, in Horton, J.W., Jr., and Cleaves, E.T., eds., 1997, Forum on Geologic Mapping Applications in the Washington-Baltimore Urban Area—Proceedings: U.S. Geological Survey Circular 1148, p. 10-12. [Link]

Horton, J.W., Jr., 1997, Cooperative Geologic Mapping in the Mid-Atlantic Urban Corridor, in Horton, J.W., Jr., and Cleaves, E.T., eds., 1997, Forum on geologic mapping applications in the Washington-Baltimore urban area—Proceedings: U.S. Geological Survey Circular 1148, p. 1-2. [Link]

Aleinikoff, J.N., Horton, J.W., Jr., and Walter, Marianne, 1996, Middle Proterozoic age for the Montpelier Anorthosite, Goochland terrane, eastern Piedmont, Virginia: Geological Society of America Bulletin, v. 108, no. 11, p. 1481-1491.

Horton, J.W., Jr., Drake, A.A., Jr., and Rankin, D.W., 1994, Terranes and overlap sequences in the central and southern Appalachians, An expanded explanation for part of the circum-Atlantic terrane map: U.S. Geological Survey Open-File Report 94-682, 40 p. https://pubs.usgs.gov/of/1994/0682/report.pdf

Blake, D.E., Butler, J.R., Druhan, R.M., Farrell, K.M., Hoffman, C.W., Horton, J.W., Jr., Lumpkin, B.L., Speer, J.A., and Stoddard, E.F., 1994, Field guide to the geology of the western flank of the Raleigh metamorphic belt, in Stoddard, E.F., and Blake, D.E., eds., Geology and field trip guide, western flank of the Raleigh metamorphic belt, North Carolina--Carolina Geological Society Field Trip Guidebook 1994: Raleigh, North Carolina Geological Survey, p. 87-110. [Link]

Stoddard, E.F., Blake, D.E., Horton, J.W., Jr., and Butler, J.R., 1994, The Falls Lake thrust: A pre-metamorphic terrane-bounding fault in the eastern North Carolina Piedmont, in Stoddard, E.F., and Blake, D.E., eds., Geology and field trip guide, western flank of the Raleigh metamorphic belt, North Carolina—Carolina Geological Society Field Trip Guidebook 1994: Raleigh, North Carolina Geological Survey, p. 39-45. [Link]

Horton, J.W., Jr., Blake, D.E., Wylie, A.S., Jr., and Stoddard, E.F., 1994, Geologic map of the Falls Lake-Wake Forest area, north-central North Carolina—A synopsis, in Stoddard, E.F., and Blake, D.E., eds., Geology and field trip guide, western flank of the Raleigh metamorphic belt, North Carolina—Carolina Geological Society Field Trip Guidebook 1994: Raleigh, North Carolina Geological Survey, p. 1-11. [Link]

Druhan, R.M., Butler, J.R., Horton, J.W., Jr., and Stoddard, E.F., 1994, The Nutbush Creek fault zone, eastern Piedmont of North Carolina and Virginia, in Stoddard, E.F., and Blake, D.E., eds., Geology and field trip guide, western flank of the Raleigh metamorphic belt, North Carolina—Carolina Geological Society Field Trip Guidebook 1994: Raleigh, North Carolina Geological Survey, p. 47-56. [Link]

Horton, J.W., Jr., Peper, J.D., Marr, J.D., Jr., Burton, W.C., and Sacks, P.E., 1993, Preliminary geologic map of the South Boston 30×60-minute quadrangle, Virginia and North Carolina: U.S. Geological Survey Open File Report 93-244, scale 1:100,000, with 21 p. text. https://pubs.er.usgs.gov/publication/ofr93244

D'Agostino, J.P., Horton, J.W., Jr., Nelson, A.E., and Clarke, J.W., 1993, Suitability of bedrock for construction stone in the Greenville 1o × 2o quadrangle, South Carolina, Georgia, and North Carolina: U.S. Geological Survey Miscellaneous Field Studies Map MF-2215-A, scale 1:250,000. https://pubs.usgs.gov/mf/2215-A/plate-1.pdf

Berquist, C.R., Jr., Drake, A.A., Evans, N.H., Farrar, S.S., Henika, W.S., Horton, J.W., Jr., Lyttle, P.T., Marr, J.D., Jr., Pavlides, Louis, and Rankin, D.W., 1993, Blue Ridge and Piedmont, in Rader, E.K., and Evans, N.H., eds., Geologic map of Virginia—Expanded explanation: Charlottesville, Virginia Division of Mineral Resources, p. 25-59.

Virginia Division of Mineral Resources, 1993, Geologic map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000.

Rankin, D.W., Drake, A.A., Jr., Goldsmith, R., Hinze, W.J., Horton, J.W., Jr., Lidiak, E.G., McLelland, J.M., and Secor, D.T., Jr., 1993, Map showing subdivisions of the Grenville orogen and younger tectonostratigraphic terranes in Eastern United States and adjacent Canada that may contain Precambrian rocks, in Reed, J.C., Jr., Bickford, M.E., Houston, R.S., Link, P.K., Rankin, D.W., Sims, P.K., and Van Schmus, W.R., eds., Precambrian: Conterminous U.S.: Boulder, Colorado, Geological Society of America, The Geology of North America, v. C-2, Plate 5B, scale 1:5,000,000.

Horton, J.W., Jr., Blake, D.E., Wylie, A.S., Jr., and Stoddard, E.F., 1992, Geologic map of the Falls Lake-Wake Forest area, north-central North Carolina: U.S. Geological Survey Open-File Report 92-269, map scale 1:24,000 with 9 p. descriptive text. [Link]

Horton, J.W., Jr., Drake, A.A., Jr., Rankin, D.W., and Dallmeyer, R.D., 1991, Preliminary tectonostratigraphic terrane map of the central and southern Appalachians: U.S. Geological Survey Miscellaneous Investigations Series Map I-2163, scale 1:2,000,000 with 15 p. interpretive pamphlet. [Link]

Rankin, D.W., Dillon, W.P., Black, D.F.B., Boyer, S.E., Daniels, D.L., Goldsmith, R., Grow, J.A., Horton, J.W., Jr., Hutchinson, D.R., Klitgord, K.D., McDowell, R.C., Milton, D.J., Owens, J.P., and Phillips, J.D., 1991, Centennial continent-ocean transect #16—E4 central Kentucky to Carolina trough: Boulder, Colorado, Geological Society of America, scale 1:500,000 with 41 p. interpretive pamphlet.

Stoddard, E.F., Farrar, S.S., Horton, J.W., Jr., Butler, J.R., and Druhan, R.M., 1991, The Eastern Piedmont in North Carolina, in Horton, J.W., Jr., and Zullo, V.A., eds., The Geology of the Carolinas, Carolina Geological Society fiftieth anniversary volume: Knoxville, University of Tennessee Press, p. 79-92.

Horton, J.W., Jr., and McConnell, K.I., 1991, The Western Piedmont, in Horton, J.W., Jr., and Zullo, V.A., eds., The Geology of the Carolinas, Carolina Geological Society fiftieth anniversary volume: Knoxville, University of Tennessee Press, p. 36-58.

Horton, J.W., Jr., and Zullo, V.A., 1991, An Introduction to the Geology of the Carolinas, in Horton, J.W., Jr., and Zullo, V.A., eds., The Geology of the Carolinas, Carolina Geological Society Fiftieth Anniversary Volume: Knoxville, University of Tennessee Press, p. 1-10.

Horton, J.W., Jr., and Zullo, V.A., eds., 1991, The Geology of the Carolinas, Carolina Geological Society Fiftieth Anniversary Volume: Knoxville, University of Tennessee Press, 406 p.

Horton, J.W., Jr., 1990, Book review: Evolution of Metamorphic Belts edited by J.S. Daly, R.A. Cliffs, and B.W.D. Yardley: Journal of Petrology, v. 31, Part 6, p. 1407-1408.

Nelson, A.E., Horton, J.W., Jr., Lesure, F.G., Bell, Henry III, and Curtin, G.C., 1990, Thrust sheets and mineral resources in the Greenville 1o × 2o Quadrangle, South Carolina, Georgia, and North Carolina,in Zupan, A.W., and Maybin, A.H., III, eds., Proceedings, 24th Forum on the Geology of Industrial Minerals, May 2-5, 1988, Greenville, S.C.: Columbia, South Carolina Geological Survey, p. 83-93.

Nelson, A.E., Horton, J.W., Jr., and Clarke, J.W., 1989, Geologic map of the Grenville 1o × 2o degree quadrangle, SC, GA, and NC: U.S. Geological Survey Open-File Report 89-9, scale 1:250,000. [Link]

Horton, J.W., Jr., Drake, A.A., Jr., Rankin D.W., Dallmeyer, R.D., and Hatcher, R.D., 1989, Southern Appalachians, in Keppie, J.D., and Dallmeyer, R.D., Tectonic map of pre-Mesozoic terranes in circum-Atlantic Phanerozoic orogens: International Geological Correlation Programme Project 233, Terranes in circum-Atlantic Paleozoic orogens, scale 1:5,000,000.

Nelson, A.E., and Horton, J.W., Jr., 1989, Structure and tectonostratigraphy of the eastern Blue Ridge and western Piedmont, in Dallmeyer, R.D., ed., Tectonostratigraphic expression of terrane accretion in the southern Appalachian orogen: A geotraverse excursion, July 23-31, 1989: Athens, The University of Georgia, IGCP Project 233 Guidebook Series, v. 4, p. 8-1 - 8-8 and 8-19 - 8-24.

Horton, J.W., Jr., Drake, A.A., Jr., and Rankin, D.W., 1989, Tectonostratigraphic terranes and their Paleozoic boundaries in the central and southern Appalachians, in Dallmeyer, R.D., ed., Terranes in the Circum-Atlantic Paleozoic Orogens: Geological Society of America Special Paper 230, p. 213-245.

Rast, Nicholas, and Horton, J.W., Jr., 1989, Mélanges and olistrostromes in the Appalachians of the United States and mainland Canada: An assessment, in Horton, J.W.,Jr., and Rast, Nicholas, eds., Mélanges and olistrostromes of the U.S. Appalachians: Geological Society of America Special Paper 228, p. 1-15.

Horton, J.W., Jr., and Rast, Nicholas, 1989, Preface, in Horton, J.W., Jr., and Rast, Nicholas, eds., Mélanges and olistostromes of the U.S. Appalachians: Geological Society of America Special Paper 228, p. v-vi.

Horton, J.W., Jr., and Rast, Nicholas, eds., 1989, Mélanges and Olistostromes of the U.S. Appalachians: Boulder, Colorado, Geological Society of America Special Paper 228, 276 p.

Gair, J.E., Horton, J.W., Jr., and D'Agostino, J.P., 1989, Stratabound iron (magnetite and hematite) deposits in metasedimentary schist and quartzite of probable Late Proterozoic age, in Gair, J.E., ed., Mineral resources of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Professional Paper 1462, p. 123-126. https://pubs.er.usgs.gov/publication/pp1462

Horton, J.W., Jr., 1989, Manganese oxides derived from weathering of stratabound spessartine-almandine garnet in schist of the Battleground Formation, Kings Mountain belt, in Gair, J.E., ed., Mineral resources of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Professional Paper 1462, p. 119-122. https://pubs.er.usgs.gov/publication/pp1462

Horton, J.W., Jr., 1989, Barite in quartz-sericite schist and schistose pyroclastic rock of the Battleground Formation, Kings Mountain belt, in Gair, J.E., ed., Mineral resources of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Professional Paper 1462, p. 115-118. https://pubs.er.usgs.gov/publication/pp1462

Horton, J.W., Jr., 1989, Sillimanite in schist of the Inner Piedmont belt, in Gair, J.E., ed., Mineral resources of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Professional Paper 1462, p. 111-113. https://pubs.er.usgs.gov/publication/pp1462

Horton, J.W., Jr., 1989, Kyanite and sillimanite in high-alumina quartzite of the Battleground Formation, Kings Mountain belt, in Gair, J.E., ed., Mineral resources of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Professional Paper 1462, p. 107-110. https://pubs.er.usgs.gov/publication/pp1462

Gair, J.E., and Horton, J.W., Jr., 1989, Cassiterite in tin-bearing pegmatites and greisens of the Inner Piedmont belt, in Gair, J.E., ed., Mineral resources of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Professional Paper 1462, p. 103-106. https://pubs.er.usgs.gov/publication/pp1462

Horton, J.W., Jr., and Gair, J.E., 1989, Spodumene in lithium-rich pegmatites of Mississippian age in the Inner Piedmont belt, in Gair, J.E., ed., Mineral resources of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Professional Paper 1462, p. 97-102. https://pubs.er.usgs.gov/publication/pp1462

Gair, J.E., Griffitts, W.R., Horton, J.W., Jr., and Goldsmith, Richard, 1989, Feldspar and mica pegmatites, in Gair, J.E., ed., Mineral resources of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Professional Paper 1462, p. 93-95. https://pubs.er.usgs.gov/publication/pp1462

Goldsmith, Richard, Milton, D.J., and Horton, J.W., Jr., 1989, Geology of the Charlotte 1o × 2o quadrangle, in Gair, J.E., ed., Mineral resources of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Professional Paper 1462, p. 7-15. https://pubs.er.usgs.gov/publication/pp1462

Goldsmith, Richard, Milton, D.J., and Horton, J.W., Jr., 1988, Geologic map of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Miscellaneous Investigations Map I-1251-E, scale 1:250,000 with interpretive pamphlet. [Link]

Bobyarchick, A.R., Edelman, S.H., and Horton, J.W., Jr., 1988, The role of dextral strike-slip in the displacement history of the Brevard zone, in Secor, D.T., Jr., ed., Southeastern Geological Excursions, Geological Society of America Southeastern Section, Columbia, South Carolina, April 4-10, 1988: Columbia, South Carolina Geological Survey, p. 53-154.

Nelson, A.E., Horton, J.W., Jr., and Clarke, J.W., 1987, Generalized tectonic map of the Greenville 1o × 2o quadrangle, Georgia, South Carolina, and North Carolina: U.S. Geological Survey Miscellaneous Field Studies Map MF-1898, scale 1:250,000. [Link]

Horton, J.W., Jr., 1987, Mineral resource potential for lithium, kyanite-sillimanite, and barite in the Charlotte 1o × 2o Quadrangle, North Carolina and South Carolina: U.S. Geological Survey Miscellaneous Investigations Map I-1251-K, scale 1:250,000. [Link]

Stoddard, E.F., Farrar, S.S., Huntsman, J.R., Horton, J.W., Jr., and Boltin, W.R., 1987, Metamorphism and tectonic framework of the northeastern Piedmont of North Carolina, in Whittecar, G.R., ed., Geological Excursions in Virginia and North Carolina, Guidebook - Field Trips No. 1-7, Geological Society of America Southeastern Section, March 24-25, 28-29, 1987: Norfolk, Virginia, Department of Geological Sciences, Old Dominion University, p. 43-86.

Horton, J.W., Jr., Sutter, J.F., Stern, T.W., and Milton, D.J., 1987, Alleghanian deformation, metamorphism, and granite emplacement in the central Piedmont of the southern Appalachians: American Journal of Science, v. 287, no. 6, p. 635-660.

Goldsmith, Richard, Horton, J.W., Jr., Milton, D.J., Gair, J.E., and D'Agostino, J.P., 1986, Resource potential for crushed stone, sand and gravel, and clay in the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Miscellaneous Investigations Map I-1251-M, scale 1:250,000, 2 sheets.

Horton, J.W., Jr., and Wintsch, R.P., 1986, Reaction and deformation in late (post-mylonitic) brittle fault rocks, Brevard fault zone: A comparison at two structural levels: Appalachian Ultradeep Core Hole (ADCOH) Project Preproposal to DOSECC Science Advisory Committee and Workshop Proceedings, October 22, 1986: assembled by R.D. Hatcher, Jr., University of Tennessee, Oak Ridge National Laboratory, p. 54-57.

Stoddard, E.F., Horton, J.W., Jr., Wylie, A.S., Jr., and Blake, D.E., 1986, The western edge of the Raleigh belt near Adam Mountain, Wake County, North Carolina, in Neathery, T.L., ed., Centennial Field Guide Volume 6, Southeastern Section of the Geological Society of America: Boulder, Colorado, Geological Society of America, p. 223-226.

Horton, J.W., Jr., and Stoddard, E.F., 1986, The Roanoke Rapids complex of the Eastern slate belt, Halifax and Northampton Counties, North Carolina, in Neathery, T.L., ed., Centennial Field Guide Volume 6, Southeastern Section of the Geological Society of America: Boulder, Colorado, Geological Society of America, p. 217-222.

Horton, J.W., Jr., and Butler, J.R., 1986, The Brevard fault zone at Rosman, Transylvania County, North Carolina, in Neathery, T.L., ed., Centennial Field Guide Volume 6, Southeastern Section of the Geological Society of America: Boulder, Colorado, Geological Society of America, p. 251-256.

Horton, J.W., Jr., and Butler, J.R., 1986, The Kings Mountain belt and spodumene pegmatite district, Cherokee and York Counties, South Carolina, and Cleveland County, North Carolina, in Neathery, T.L., ed., Centennial Field Guide Volume 6, Southeastern Section of the Geological Society of America: Boulder, Colorado, Geological Society of America, p. 239-244.

Horton, J.W., Jr., Blake, D.E., Wylie, A.S., Jr., and Stoddard, E.F., 1986, Metamorphosed mélange terrane in the eastern Piedmont of North Carolina: Geology, v. 14, no. 7, p. 551-553.

Brown, P.M., and others, compilers, 1985, Geologic Map of North Carolina: North Carolina Department of Natural Resources and Community Development, Geological Survey Section, scale 1:500,000.

Horton, J.W., Jr., 1984, Stratigraphic nomenclature in the Kings Mountain belt, North Carolina and South Carolina, in Stratigraphic Notes, 1983: U.S. Geological Survey Bulletin 1537-A, p. A59-A67. https://pubs.er.usgs.gov/publication/b1537A

Horton, J.W., Jr., Zietz, Isidore, and Neathery, T.L., 1984, Truncation of the Appalachian Piedmont beneath the Coastal Plain of Alabama: Evidence from new magnetic data: Geology, v. 12, p. 51-55.

Goldsmith, Richard, Milton, D.J., and Horton, J.W., Jr., 1982, Simplified preliminary geologic map of the Charlotte 1o × 2o quadrangle, North Carolina and South Carolina: U.S. Geological Survey Open-File Report 82-56, scale 1:250,000. [Link]

Horton, J.W., Jr., and Gair, J.E., 1982, Geology and mineral-resource potential of the Charlotte 1o × 2o quadrangle, North Carolina - South Carolina, in Exploration for Metallic Resources in the Southeast: Athens, University of Georgia Department of Geology and Center for Continuing Education, p. 56-61.

Horton, J.W., Jr., 1982, Geologic Map and Mineral Resources Summary of the Rosman Quadrangle, North Carolina: Raleigh, North Carolina Department of Natural Resources and Community Development, Geological Survey Section, GM 185-NE (scale 1:24,000), MRS 185-NE, 4 p. text.

Horton, J.W., Jr., Butler, J.R., Schaeffer, M.F., Murphy, C.F., Connor, J.M., Milton, D.J., and Sharp, W.E., 1981, Field guide to the geology of the Kings Mountain belt between Gaffney, South Carolina, and Lincolnton, North Carolina, in Horton, J.W., Jr., and others, eds., Geological investigations of the Kings Mountain belt and adjacent areas in the Carolinas (Carolina Geological Society Field Trip Guidebook 1981): Columbia, South Carolina Geological Survey, p. 213-247. http://carolinageologicalsociety.org/CGS/1980s_files/gb%201981.pdf

Horton, J.W., Jr., and Butler, J.R., 1981, Geology and mining history of the Kings Mountain belt in the Carolinas—A summary and status report, in Horton, J.W., Jr., and others, eds., Geological investigations of the Kings Mountain belt and adjacent areas in the Carolinas (Carolina Geological Society Field Trip Guidebook 1981): Columbia, South Carolina Geological Survey, p. 194-212. http://carolinageologicalsociety.org/CGS/1980s_files/gb%201981.pdf

Horton, J.W., Jr., 1981, Geologic map of the Kings Mountain belt between Gaffney, South Carolina, and Lincolnton, North Carolina, in Horton, J.W., Jr., and others, eds., Geological investigations of the Kings Mountain belt and adjacent areas in the Carolinas (Carolina Geological Society Field Trip Guidebook 1981): Columbia, South Carolina Geological Survey, p. 6-18. http://carolinageologicalsociety.org/CGS/1980s_files/gb%201981.pdf

Horton, J.W., Jr., Butler, J.R., and Milton, D.J., 1981, Foreword and Dedication, in Horton, J.W., Jr., and others, eds., Geological investigation of the Kings Mountain belt and adjacent areas in the Carolinas (Carolina Geological Society Field Trip Guidebook 1981): Columbia, South Carolina Geological Survey, p. v-vii. http://carolinageologicalsociety.org/CGS/1980s_files/gb%201981.pdf

Horton, J.W., Jr., Butler, J.R., and Milton, D.J., eds., 1981, Geological investigations of the Kings Mountain belt and adjacent areas in the Carolinas (Carolina Geological Society Field Trip Guidebook 1981): Columbia, South Carolina Geological Survey, 247 p. http://carolinageologicalsociety.org/CGS/1980s_files/gb%201981.pdf

Horton, J.W., Jr., 1981, Shear zone between the Inner Piedmont and Kings Mountain belts in the Carolinas: Geology, v. 9, no. 1, p. 28-33.

Horton, J.W., Jr., and Butler, J.R., 1977, Guide to the geology of the Kings Mountain belt in the Kings Mountain area, North Carolina and South Carolina, in Burt, E.R., ed., Field guides for Geological Society of America, Southeastern Section Meeting, Winston-Salem, North Carolina: Geology and Mineral Resources Section, North Carolina Department of Natural and Economic Resources, p. 76-143.