Randall C Orndorff

After being the recent Acting Director position for the Office of Science Quality and Integrity (OSQI), Randall C. Orndorff will be returning to his position as a research geologist for the Florence Bascom Geoscience Center.

Biography

Career History and Highlights

Randall is a geologic mapper and karst specialist for the Florence Bascom Geoscience Center in Reston, VA.  His current projects include geologic mapping a karst research in the Shenandoah Valley of Virginia, Greenbrier Valley of West Virginia, and the souther Lake Champlain region of New York and Vermont.  As the Acting Director for the Office of Science Quality and Integrity from May 2016 to January 2017, Randall was tasked with monitoring and enhancing the integrity, quality, and health of United States Geological Survey science through executive oversight and development of strong practices, policy, and supporting programs listed below. Prior to Acting Director of OSQI, Randall was the Director of the Eastern Geology and Paleoclimate Science Center (2010-2016). In this role, he was responsible for overseeing geologic mapping and paleoclimate studies in the eastern United States as well as karst, landslide, and earthquake hazards.  From 2002 to 2010, he was Associate Program Coordinator for the National Cooperative Geologic Mapping Program. With more than 30 years at the USGS as a scientist, program coordinator, and science center director, he has brought a wealth of knowledge to his leadership roles.

Education

Randy earned both a bachelor’s degree (1983) and master’s degree (1985) in geology from Old Dominion University.

Publications

1. Orndorff, R.C., 1985, Annotated bibliography of coal in the Caribbean region:  U.S. Geological Survey Open-File Report 85-110, 31 p.

2. Orndorff, R.C., 1985, Conodont biostratigraphy of the Cambrian-Ordovician boundary interval in the northern Shenandoah Valley of Virginia, U.S.A.:  Unpublished Masters thesis, Old Dominion University, Norfolk, Virginia, 107 p.

 

3. Orndorff, R.C., 1988, Latest Cambrian and earliest Ordovician conodonts from the Conococheague and Stonehenge Limestones of northwestern Virginia:  U.S. Geological Survey Bulletin 1837, chapter A, 18 p.

4. Orndorff, R.C., Harris, A.G., and Schultz, A.P., 1988, Reevaluation of conodont color alteration patterns in Ordovician rocks, east-central Valley and Ridge and western Blue Ridge Provinces, Tennessee:  U.S. Geological Survey Bulletin 1839, chapter D, 10 p. 

5. Orndorff, R.C., Taylor, J.F., and Traut, R.W., 1988, Uppermost Cambrian and lowest Ordovician conodont and trilobite biostratigrahpy in northwestern Virginia:  Virginia Division of Mineral Resources, Virginia Minerals, v. 34, n. 2, p. 13-20.

 

6. Orndorff, R.C., 1989, Oldest Knox Group rocks identified in windows through the Great Smoky Thrust Sheet, east Tennessee:  earliest Ordovician conodonts from the Calderwood Window:  Southeastern Geology, vol. 29, no. 4, p. 211-220.

7. Orndorff, R.C., Dodd, Kurt, Gunnells, G.B., and Sakss, Yula, 1989, Computer programs released as U.S. Geological Survey publications through August 1989:  U.S. Geological Survey Open-File Report 89-681, 70 p.

 

8. Fuller, H.K., Gunnells, G.B., Buffa, E.A., and Orndorff, R.C., 1990, Geologic map index of Virginia:  U.S. Geological Survey Geologic Map Index, 6 sheets. [Compiled 30% of data and computer plots]

 

9. Orndorff, R.C., 1992, Tectonic significance of cross-strike faults in the central Appalachian Great Valley of Maryland and West Virginia:  Southeastern Geology, vol. 32, no. 4, p.197-214.

 

10. MacLachlan, M.E., Bryant, W.A., Judkins, T.W., Koozmin, E.D., Orndorff, R.C., Hubert, M.L., Murdock, C.R., Starrat, S.W., and LeCompte, J.R., 1992, Stratigraphic nomenclature databases for the United States, its possessions and territories:  U.S. Geological Survey Digital Data Series DDS-6. [Created database for the Appalachians and parts of other provinces]

 

11. Taylor, J.F., Repetski, J.E., and Orndorff, R.C., 1992, The Stonehenge Transgression:  A rapid submergence of the central Appalachian platform in the Early Ordovician, in, Webby, B.D., and Laurie, J.R., Global perspectives on Ordovician geology:  Proceedings of the 6th International Symposium on the Ordovician, A.A. Balkema, Rotterdam, p. 409-418. [Provided several stratigraphic sections and conodonts]

 

12. Orndorff, R.C., Epstein, J.B., and McDowell, R.C., 1993, Preliminary geologic map of the Middletown quadrangle, Frederick and Shenandoah Counties, Virginia:  U.S. Geological Survey Open-file Report 93-24, scale 1:24,000.  [Mapped 70% of quadrangle and produced 100% of map and report]

 

13. McGurk, J.M., Orndorff, R.C., Dodd, Kurt, Gunnels, G.B., and Sakss, Yula, 1993, Computer programs released as U.S. Geological Survey publications through June 1993:  U.S. Geological Survey Open-File Report 93-575, 6 p., 1 diskette. 

14. Orndorff, R.C., and Goggin, K.E., 1994, Sinkholes and karst related features of the Shenandoah Valley of the Winchester 30 X 60 minute quadrangle, Virginia and West Virginia:  U.S. Geological Survey, Miscellaneous Field Studies Map MF-2262, scale 1:100,000. 

 

15.   Orndorff, R.C., and Epstein, J.B., 1994, A structural and stratigraphic excursion through the Shenandoah Valley, northern Virginia:  U.S. Geological Survey Open-file Report 94-573, 24 p. 

 

16. Epstein, J.B., Orndorff, R.C., and Rader, E.K., 1995, The Stickley Run Member of the Martinsburg Formation, Shenandoah Valley, northern Virginia:  U.S. Geological Survey Bulletin 2135, p. 1-13.

17. Owens, J.P., Sugarman, P.J., Sohl, N.F., Parker, R.A., Houghton, H.F., Volkert, R.A., Drake, A.A., Jr., and Orndorff, R.C., 1995, Geologic map of New Jersey, Central Sheet:  U.S. Geological Survey, Open-file Report 95-253, scale 1:100,000, 60 p. 

 

18. Owens, J.P., Sugarman, P.J., Sohl, N.F., and Orndorff, R.C., 1995, Geologic map of New Jersey, Southern Sheet:  U.S. Geological Survey, Open-file Report 95-254, scale 1:100,000, 45 p.

 

19.  Orndorff, R.C., 1995, Geologic map of part of the Muddy Creek drainage basin, Singers Glen quadrangle, Rockingham County, Virginia:  U.S. Geological Survey Open-file Report 95-629, scale 1:24,000.

 

20. Wieczorek, G.F., Morgan, B.A., Campbell, R.H., Orndorff, R.C., Burton, W.C., Southworth, C.S., and Smith, J.A., 1996, Preliminary inventory of landslide, debris flow, and flood effects of the June 27, 1995, storm in Madison County, Virginia, showing time sequence of positions of storm-cell center:  U.S. Geological Survey Open-file Report 96-13, scale 1:24,000, 8 p. 

 

21. Rader, E.K., McDowell, R.C., Gathright, T.M., and Orndorff, R.C., 1996, Geologic map of Clarke, Frederick, Page, Shenandoah, and Warren Counties, Virginia:  Lord Fairfax Planning District:  Virginia Division of Mineral Resources Publication 143, scale 1:100,000. 

22. Harrison, R.W., Orndorff, R.C., and Weems, R.E., 1996, Geology of the Fort Leonard Wood Military Reservation and adjacent areas, south-central Missouri:  U.S. Geological Survey Open-file Report 96-60, 255 p., scale 1:24,000. http://pubs.er.usgs.gov/publication/ofr9660 

 

23. Harrison, Richard, Orndorff, Randall, McDowell, Robert, and Weems, Robert, 1997, Geology of the Ozark National Scenic Riverways:  U.S. Geological Survey Fact Sheet FS-050-97, 2 p.

 

24. Orndorff, R.C., and Harrison, R.W., 1997, Preliminary geologic map of the Spring Valley 30' X 60' quadrangle, Missouri:  U.S. Geological Survey Open-file Report 97-434, scale 1:100,000. 

 

25. McDowell, R.C., Orndorff, R.C., Harrison, R.W., Weems, R.E., Weary, D.J., Repetski, J.E., Imes, J.L., and Kleeschulte, M.J., 1998, New geologic mapping in the Ozarks of southern Missouri, USA:  An approach to understanding the hydrologic framework, in, Brahana, J.V., and others, Gambling with groundwater–physical, chemical, and biological aspects of aquifer-stream relations:  Proceedings of the International Association of Hydrologists Annual Meeting, September 27-October 2, 1998, Las Vegas, NV, p. 527-531.  

 

26. Orndorff, R.C., Epstein, J.B., and McDowell, R.C., 1999, Geologic map of the Middletown quadrangle, Frederick, Shenandoah, and Warren Counties, Virginia:  U.S. Geological Survey Geologic Quadrangle Map GQ-1803, scale 1:24,000.  https://pubs.er.usgs.gov/publication/gq1803  

 

27. Orndorff, R.C., editor, 1999, Bedrock geologic map of central and southern New Jersey:  U.S. Geological Survey Miscellaneous Investigations Map I-2540-B, scale 1:100,000, 4 sheets.

 

28. Orndorff, R.C., Harrison, R.W., and Weary, D.J., 1999, Geologic map of the Eminence quadrangle, Shannon County, Missouri:  U.S. Geological Survey Miscellaneous Investigations Map I-2653, scale 1:24,000.  https://pubs.er.usgs.gov/publication/i2653 

29. Orndorff, R.C., Sebela, Stanka, Weary, D.J., McDowell, R.C., Harrison, R.W., and Weems, R.E., 1999, A geologic framework in karst–U.S. Geological Survey contributions to the hydrogeology of the Ozarks of Missouri, in, Beck, B.F., Pettit, A.P., and Herring, J.G., eds., Hydrogeology and engineering geology of sinkholes and karst-1999: Proceedings of the Seventh Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst, Harrisburg, PA: Rotterdam, A.A. Balkema, p.57-62.  

 

30. Sebela, Stanka, Orndorff, R.C., and Weary, D.J., 1999, Geological controls in the development of caves in the south-central Ozarks of Missouri, USA: Acta Carsologica, v. 28/2, p. 273-291.

 

31. Sarros, M.J., Orndorff, R.C., Gathright, T.M., 1999, Geologic traverse across the North Mountain thrust sheet, southern Page Valley and northern Shenandoah Valley, Virginia: Virginia Division of Mineral Resources, 29th Annual Virginia Geologic Field Conference, 33 p.  

 

32. Southworth, S., Brezinski, D.K., Orndorff, R.C., Lagueux, K.M., and Chirico, P.G., 2000, Digital geologic map of the Harpers Ferry National Historical Park:  U.S. Geological Survey Open-file Report 00-297, CD-ROM. 

 

33. Orndorff, R.C., Weary, D.J., Lagueux, K.M., 2000, Geographic information systems analysis of geologic controls on the distribution of dolines in the Ozarks of south-central Missouri, USA:  Acta Carsologica, v. 29/2, p. 161-175.  http://carsologica.zrc-sazu.si/downloads/292/randall.pdf  

 

34. Orndorff, R.C., Weary, D.J., and Sebela, Stanka, 2001, Geologic framework of the Ozarks of south-central Missouri—contributions to a conceptual model of karst, in, Kuniansky, E.L., U.S. Geological Survey Karst Interest Group Workshop Proceedings, St. Petersburg, Florida:  U.S. Geological Survey Water Resources Investigations Report 01-4011, p.18-24.  http://water.usgs.gov/ogw/karst/kigconference/rco_geologicozarks.htm 

35. Orndorff, R.C., Epstein, J.B., and Weary, D.J., 2001, Proposed national atlas karst map, in, Kuniansky, E.L., U.S. Geological Survey Karst Interest Group Workshop Proceedings, St. Petersburg, Florida:  U.S. Geological Survey Water Resources Investigations Report 01-4011, p. 46.

 

36. Rader, E.K., McDowell, R.C., Gathrigth, T.M., and Orndorff, R.C., 2001, Geologic map of the Virginia portion of the Winchester 30 X 60 minute quadrangle:  Virginia Division of Mineral Resources Publication 161, scale 1:100,000.

 

37. Southworth, C.S., Brezinski, D.K., Orndorff, R.C., Chirico, P.G., Lagueux, K.M., 2001, Geology of the Chesapeake and Ohio Canal National Historical Park and Potomac River Corridor, District of Columbia, Maryland, West Virginia, and Virginia:  U.S. Geological Survey Open-file Report 01-188, digital.

 

38. Orndorff, Randall C. and Harrison, R.W., 2001, Geologic map of the Winona quadrangle, Shannon County, Missouri:  U.S. Geological Survey Geologic Investigations Map I-2749, scale 1:24,000  https://pubs.er.usgs.gov/publication/i2749. 

 

39. Orndorff, R.C, Epstein, J.B., Weary, D.J., and Harlow, G.E., 2001, Geologic aspects of karst in the Appalachians, in, Adams, D.B., Burke, K., Hemingway, B., Keay, J., and Yurewicz, M., compilers, U.S. Geological Survey Appalachian Region Integrated Science Workshop Proceedings, Gatlinburg, Tennessee, October 22-26, 2001:  U.S. Geological Survey, Open-File Report 01-406, p. 57.

 

40. Weary, D.J., and Orndorff, R.C., 2002, Physical controls on karst features in the Ozark Plateaus of Missouri, USA, as determined by multivariate analyses in a geographic information system (GIS):  Acta Carsologica, v. 30/2, p. 181-194.

 

41. Orndorff, R.C., 2002, Memorial to Robert C. McDowell:  Geological Society of America, Memorials, v. 32, p. 9-11.

 

42. Orndorff, R.C., and Harlow, G.E., 2002, Geohydrologic framework of the northern Shenandoah Valley carbonate aquifer system, in, Kuniansky, E.L., U.S. Geological Survey Karst Interest Group Workshop Proceedings, Shepherdstown, West Virginia:  U.S. Geological Survey Water Resources Investigations Report 02-4174, p. 81-89.  http://water.usgs.gov/ogw/karst/kig2002/rco_field.html

 

43. Epstein, J.B., Weary, D.J., Orndorff, R.C., Bailey, Z.C., and Kerbo, R.C., 2002, National karst map, an update, in, Kuniansky, E.L., U.S. Geological Survey Karst Interest Group Workshop Proceedings, Shepherdstown, West Virginia:  U.S. Geological Survey Water Resources Investigations Report 02-4174, p. 43.

 

44. Harrison, R.W., Orndorff, R.C., and Weary, D.J., 2002, Geologic map of the Stegall Mountain quadrangle, Shannon and Carter Counties, Missouri:  U.S. Geological Survey Geologic Investigations Map I-2767, scale 1:24,000.

 

45. Southworth, Scott, Brezinski, D.K., Drake, A.A., Jr., Burton, W.C., Orndorff, R.C., Froelich, A.J., 2002, Digital geologic map and database of the Federick 30’ X 60’ quadrangle, Maryland, Virginia, and West Virginia:  U.S. Geological Survey Open-file Report 02-347, scale 1:100,000, 79 p.

 

46. Orndorff, R.C., Weary, D.J., and Sebela, Stanka, 2003, Geologic framework of the Ozarks of south-central Missouri:  Missouri Speleology, v. 42, n. 1, p. 1-8.

 

47. Sebela, Stanka, Orndorff, R.C., and Weary, D.J., 2003, Geologic controls in the development of caves in the south-central Missouri Ozarks:  Missouri Speleology, v. 42, n. 2, p. 9-19.

 

48. Orndorff, R.C., Weary, D.J., and Parker, R.A., 2003, Geologic map of the Winchester quadrangle, Frederick County, Virginia:  U.S. Geological Survey Open-file Report 03-461, scale 1:24,000.  http://pubs.usgs.gov/of/2003/of03-461/

 

49. Orndorff, R.C., 2004, Geologic map of the Fremont quadrangle, Shannon and Carter Counties, Missouri:  U.S. Geological Survey Geologic Investigations Map I-2775, scale 1:24,000.  https://pubs.er.usgs.gov/publication/i2775

 

50. Orndorff, R.C., 2004, The National Geologic Mapping Act, in, Thomas, W.A., Meeting challenges with geologic maps:  American Geological Institute, Environmental Awareness Series, p. 65.

 

51. Harlow, G.E., Jr., Orndorff, R.C., Nelms, D.L., Weary, D.J., and Moberg, R.M., 2005, Hydrogeology and ground-water availability in the carbonate aquifer system of Frederick County, Virginia:  U.S. Geological Survey U.S. Geological Survey Scientific Investigations Report SIR 2005-5161, 30 p.

 

52. Weary, D.J., Orndorff, R.C., and Aleman-Gonzalez, W., 2006, Geologic map of the Stephens City quadrangle, Clarke, Frederick, and Warren Counties, VA:  U.S. Geological Survey Open-File Report 2006-1173, scale 1:24,000.

 

53. Orndorff, R.C., Weary, D.J., and Harrison, R.W., 2006, The role of sandstone in the development of an Ozark karst system, south-central Missouri, in Harmon, R.S., and Wicks, C., eds., Perspectives on karst geomorphology, hydrology, and geochemistry-A tribute volume to Derek C. Ford and William B. White:  Geological Society of America Special Paper 404, p. 31-38.  http://specialpapers.gsapubs.org/content/404/31.full.pdf+html

 

54. Southworth, Scott, Brezinski, D.K., Drake, A.A., Jr., Burton, W.C., Orndorff, R.C., Froelich, A.J., Reddy, J.E, Denenny, Danielle, and Daniels, D.L., 2007, Geologic map of the Federick 30’ X 60’ quadrangle, Maryland, Virginia, and West Virginia:  U.S. Geological Survey Scientific Investigations Map 2889, scale 1:100,000, 42 p.

 

55. U.S. Geological Survey Geologic Names Committee (Orndorff, R.C., Chair and preparer), 2007, Divisions of geologic time—Major chronostratigraphic and geochronologic units:  U.S. Geological Survey Fact Sheet 2007-3015, 2 p.

 

56. Weary, D.J., Doctor, D.H., Epstein, J.B., and Orndorff, R.C., 2008, Characterizing regional karst types under the framework of the new National Karst Map?, in Kuniansky, E.L, ed., U.S. Geological Survey Karst Interest Group Proceedings, Bowling Green Kentucky, May 27-29, 2008: U.S. Geological Survey Scientific Investigations Report 2008-5023, p. 25-33.

 

57. Southworth, Scott, Orndorff, R.C., Brezinski, D.K., and Weary, D.W., 2008, Appalachian geology transect from the Piedmont province west to the Valley and Ridge province:  Association of American State Geologists, Annual Meeting Field Guide, Shepherdstown, WV, 152 p.

 

58. Doctor, D.H., Weary, D.J., Epstein, J.B., and Orndorff, R.C., 2008, A karst aquifer map for the United States—Is it possible?, in Kuniansky, E.L, ed., U.S. Geological Survey Karst Interest Group Proceedings, Bowling Green Kentucky, May 27-29, 2008: U.S. Geological Survey Scientific Investigations Report 2008-5023, p. 34-36.

 

59. Doctor, D.H., Weary, D.J., Orndorff, R.C., Harlow, G.E., Jr., Kozar, M.D., and Nelms, D.L., 2008, Bedrock structural controls on the occurrence of sinkholes and springs in the northern Great Valley karst, Virginia and West Virginia, in, Yuhr, L.B., Alexander, C.E., Jr., and Beck, B.F., eds., 2008, Proceedings of the Eleventh Multidisciplinary Conference—Sinkholes and the engineering and environmental impacts of karst, Tallahassee, Florida:  American Society of Civil Engineers, Geotechnical Publication no. 183, p.12-22.

 

60. Southworth, Scott, Brezinski, D.K., Orndorff, R.C., Repetski, J.E., and Denenny, D.M., 2008, Geology of the Chesapeake and Ohio Canal National Historical Park and Potomac River Corridor, District of Columbia, Maryland, West Virginia, and Virginia:  U.S. Geological Survey Professional Paper 1691, 144 p. 1 pl.

 

61. Orndorff, R.C., Lyttle, P.T., Bybell, L.M., and Quintana, Lydia, 2008, The National Cooperative Geologic Mapping Program and insight into the future of geologic map production, in, Soller, D.R., ed, Digital mapping techniques ’07-Workshop proceedings:  U.S. Geological Survey Open-file Report, 2008-1385, p. 47-52.

 

62. Doctor, D.H., Orndorff, W.D., and Orndorff, R.C., 2009, Overview of the Shenandoah Valley karst of Virginia and West Virginia, in, Stafford, K.W. and Fratesi, B., eds, Excursion guidebook for the fifteenth International Congress of Speleology of the International Union of Speleology:  Greyhound Press, Huntsville, AL, p. 84-96.  IP-8891.

 

63. Orndorff, R.C.(ed.), 2009, Set in stone – The work of the National Commission on Stratigraphic Nomenclature:  Stratigraphy, v. 6, no. 2, p. 89. http://www.micropress.org/microaccess/stratigraphy/issue-260/article-1638.  IP-12925.

 

64. U.S. Geological Survey Geologic Names Committee (Orndorff, R.C., Chair and preparer), 2009, Divisions of geologic time—Major chronostratigraphic and geochronologic units:  Stratigraphy, v. 6, no. 2, p. 90-92.

 

65. Orndorff, R.C. and Weary, D.J., 2009, Geologic map of the Round Spring quadrangle, Shannon County, Missouri:  U.S. Geological Survey Scientific Investigations Map 3073, scale 1:24,000. http://pubs.usgs.gov/sim/3073/.  IP-12817 .

 

66. Lowell, G.R., Harrison, R.W., Weary, D.W., Orndorff, R.C., Repetski, J.E., and Pierce, H.A., 2010, Rift-related volcanism and karst geohydrology of the southern Ozark dome, in Evans, K.R., and Aber, J.S., eds., From Precambrian rift volcanics to the Mississippian shelf margin:  Geological field excursions in the Ozark Mountains:  Geological Society of America Field Guide 17, p. 99-158.  IP-20395.

 

67. U.S. Geological Survey Geologic Names Committee (Orndorff, R.C., Chair and preparer), 2010, Divisions of geologic time—Major chronostratigraphic and geochronologic units:  U.S. Geological Survey Fact Sheet 2010-3059, 2 p. IP-21451.

 

68. Raney, Jay, Orndorff, Randall, Fleeger, Gary, and Brezinski, David, 2010, Guidebook for geosciences field trip Pittsburgh, Pennsylvania, to Washington, D.C.:  Jackson School of Geosciences, University of Texas, GeoFORCE 12th Grade Academy, 102 p.

 

69. Doctor, D.H., Orndorff, R.C., Parker, R.A., Weary, D.E., and Repetski, J.E., 2010, Geologic Map of the White Hall quadrangle, Frederick County, Virginia:  U.S. Geological Survey Open-file Report 2010-1265, scale 1:24,000. http://pubs.usgs.gov/of/2010/1265/. Director’s approval 10-21-10.

 

70. Jacobsen, L.J., Glynn, P.D., Phelps, G.A., Orndorff, R.C., Bawden, G.W., and Grauch, V.J.S., 2011, U.S. Geological Survey: a synopsis of three-dimensional modeling, in Berg, R.C. , Mathers, S. J., Kessler, H., and D.A. Keefer (eds.): Synopsis of Current Three-dimensional Modeling in Geological Survey Organizations, Illinois State Geological Survey Circular 578, p. 69-79.  IP-24495.

 

71. Glynn, P.D., Jacobsen, L., Phelps, G., Bawden, G., Grauch, V., Orndorff, R., Winston, R., Fienen, M., Cross, V., and Bratton, J., 2011, 3D/4D modeling, visualization and information frameworks—Current U.S. Geological Survey practice and needs, in, Russell, H.A.J., Berg, R.C., and Throliefson, L.H., Three-dimensional geological mapping: Geological Survey of Canada, Open File Report 6998, p. 33-38.  IP-32253.

 

72. Orndorff, R.C., 2012, Fold-to-fault progression of a major thrust zone revealed in horses of the North Mountain fault zone, Virginia and West Virginia, USA:  Journal of Geological Research, v. 2012, article 294093, 13 p. http://www.hindawi.com/journals/jgr/2012/294093/.  IP-27226.  DOI:10.1155/2012/294093.

 

73. Weary, D.J., and Orndorff, R.C., 2012, Geologic map of the Alley Spring quadrangle, Shannon County, Missouri:  U.S. Geological Survey Scientific Investigations Map 3161, scale 1:24,000. https://pubs.usgs.gov/sim/3161/pdf/sim3161_alleyspring_mo.pdf.  IP-9297. DOI: 10.3133/sim3161.

 

74. Evenson, E.J., Orndorff, R.C., Blome, C.D., Bohlke, J.K., Hershberger, P.K., Langenheim, V.E., McCabe, G.J., Morlock, S.E., Reeves, H.W., Verdin, J.P. Weyers, H.S., Wood, T.M., 2012, Strategic directions for U.S. Geological Survey water science, 2012-2022:  Observing, understanding, predicting, and delivering water science to the Nation:  USGS Open-file Report 2012-1066, 42 p.  IP-33735.

 

75. Evenson, E.J., Orndorff, R.C., Blome, C.D., Bohlke, J.K., Hershberger, P.K., Langenheim, V.E., McCabe, G.J., Morlock, S.E., Reeves, H.W., Verdin, J.P. Weyers, H.S., Wood, T.M., 2012, U.S. Geological Survey water science strategy--Observing, understanding, predicting, and delivering water science to the Nation:  USGS Circular 1383-G, 49 p. https://pubs.usgs.gov/circ/1383g/.  IP-41201 .

 

76. Weary, D.J., Orndorff, R.C., and Repetski, J.E., 2013, Geologic map of the Jam Up Cave and Pine Crest quadrangles, Shannon, Texas, and Howell Counties, Missouri:  U.S. Geological Survey, Scientific Investigations Map 3248, scale 1:24,000.  IP-36868.

 

77. Evenson, E.J., and Orndorff, R.C., 2013, U.S. Geological Survey Water Science Strategy:  U.S. Geological Survey, Fact Sheet 2013-3064, 2 p.  IP-45923.

 

78. Easton, R.M., Catuneanu, Octavian, Donovan, A.D., Fluegeman, R.H., Hamblin, A.P., Harper, Howard, Lasca, N.P., Morrow, J.R., Orndorff, R.C., Sadler, Peter, Scott, R.W., Tew, B.H., 2014, North American Commission on Stratigraphic Nomenclature, Note 66--Records of Stratigraphic Commission, 2003-2013:  Stratigraphy, v. 11, no. 2, p. 143-157.  IP-56320.

 

79. Weary, D.J., Harrison, R.W., Orndorff, R.C., Weems, R.E., Schindler, J.S., Repetski, J.E., and Pierce, H.A., 2014, Bedrock geologic map of the Spring Valley, West Plains, and parts of the Piedmont and Poplar Bluff 30ʹ x 60ʹ quadrangles, Missouri, including the upper Current River and Eleven Point River Drainage basins:  U.S. Geological Survey Scientific Investigations Map SIM-3280. Scale 1:100,000. http://pubs.usgs.gov/sim/3280/. IP-033086. DOI: 10.3133/sim3280

 

80. Easton, R.M., Edwards, L.E., and Orndorff, R.C., 2014, North American Commission on Stratigraphic Nomenclature, Note 67--Application for revision of Articles 36 and 37, Lithodemic Units, of the North American Stratigraphic Code:  Stratigraphy, v. 12, p. 39-45.  IP-63649.

 

81. Edwards, L.E., Orndorff, R.C., Head, M.J., and Fensome, R.A., 2014, It’s time to revitalize the Tertiary, in Rocha, R., et al., eds., STRATI 2013, Springer Geology, Springer International Publishing Switzerland, p. 937-941.  IP-44566.  DOI: 10.1007/978-3-319-04364-7_176.

 

82. Leslie, S.A., Goldman, D., and Orndorff, R.C., eds., 2015, The Ordovician Exposed – Short Papers and Abstracts for the 12th International Symposium on the Ordovician System: Stratigraphy, v. 12, 288 p.

 

83. Haynes, J.T., Goggin, K.E., and Orndorff, R.C., 2015, Ordovician of Germany Valley, West Virginia:  The Ordovician Exposed – 12th International Symposium on the Ordovician System, Field Trip Guidebook, Stratigraphy, v. 12, n. 3-4, 45 p. http://www.micropress.org/microaccess/stratigraphy/issue-317/article-1930.  IP-66704/70856.

 

84. Taylor, J.F., Mitchell, C.E., Orndorff, R.C., and Repetski, J.E., 2015, Furongian and Ordovician units of the Shenandoah Valley, Virginia in, Taylor, J.F. and Loch, J.D., eds., The central Appalachians:  The Ordovician Exposed – 12th International Symposium on the Ordovician System, Field Trip Guidebook, Stratigraphy, v. 12, 117 p.  IP-68793.

 

85. Doctor, D.H., Weary, D.J., Brezinski, D., Orndorff, R.C., and Spangler, L., 2015, Karst of the Mid-Atlantic region in Maryland, West Virginia, and Virginia, in Brezinski, D.K., Halka, J.P., and Ortt, R.A., Jr., eds, Tripping from the Fall Line:  Field excursions for the GSA Annual Meeting, Baltimore, 2015:  Geological Society of America, Field Trip Guidebook 40, p. 425-484.  IP-66715 DOI: 10.1130/2015.0040(11). 

 

86. Evans, M.A., Orndorff, R.C., and Henika, William, 2016, Structural geology of the Valley and Ridge and Plateaus provinces, in Bailey, C.M., Sherwood, W.C., Eaton, L.S., and Powars, D.S., eds., The Geology of Virginia:  Virginia Museum of Natural History, Special Publication 18, p. 55-86.  IP-67294.

 

87. Weary, D.J., Orndorff, R.C., Harrison, R.W., and Weems, R.E., 2016, Digital geologic map data for the Ozark National Scenic Riverways and adjacent areas along the Current River and Jacks Fork, Missouri: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7CJ8BKB, and Data Series 1017.  IP-55549/76547. DOI: 10.3133/ds1017

 

88. Easton, R.M., Edwards, L.E., Orndorff, R.C., Duguet, Manuel, and Ferrusquia-Villafranca, Ismael, 2016, North American Commission on Stratigraphic Nomenclature Report 12 - Revision of Article 37, Lithodemic units of the North American Stratigraphic Code:  Stratigraphy, v. 13, p. 220-222.  IP-82234.

 

89. Weary, D.J. and Orndorff, R.C., 2017, Geologic context of large karst springs and caves in the Ozark National Scenic Riverways, Missouri: in Kuniansky, E.L., and Spangler, L.E., eds., 2017, U.S. Geological Survey Karst Interest Group Proceedings, San Antonio, Texas, May 16–18, 2017: U.S. Geological Survey Scientific Investigations Report 2017–5023, p. 135-146. http://doi.org/10.3133/sir20175023. IP-082624.  DOI: 10.3133/sir20175023

 

90. Heller, M.J., Orndorff, R.C., and Hubbard, D.A, 2018, Geologic map of the Timberville quadrangle, Virginia:  Virginia Division of Geology and Mineral Resources Publication 186, scale 1:24,000.  https://www.dmme.virginia.gov/commerce/ProductDetails.aspx?productID=2991 IP-092548.

 

91. Orndorff, R.C., Knight, M.A., Krupansky, J.T., Al-Akhras, K.M., Stamm, R.G., Abdul Samad, U.S., and Ahmed, Elalim, 2018, Linking geology and geotechnical engineering in karst – The Qatar geologic mapping project, in, Sasowsky, I.D., Byle, M.J., and Land, Lewis, eds., Proceedings of the 15th Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst, and the 3rd Appalachian Karst Symposium:  National Cave and Karst Research Institute Symposium 7, p. 383-391.  IP-096583.

 

92. U.S. Geological Survey Geologic Names Committee (Orndorff, R.C., Chair and preparer), 2018, Divisions of geologic time—Major chronostratigraphic and geochronologic units:  U.S. Geological Survey Fact Sheet 2018-3054, 2 p. https://doi.org/10.3133/fs20183054.  IP-098903.  DOI: 10.3133/fs20183054.