Lucy Edwards
Lucy Edwards is a Scientist Emeritus at the Florence Bascom Geoscience Center.
Lucy E Edwards focuses her research on the stratigraphy of the Atlantic and Gulf Coastal Plains. Her specialty is dinoflagellates (a type of algae), and she studies their fossil cysts for what they reveal about the time and environment of deposition and how they came to be preserved in the fossil record. She also specializes in stratigraphic nomenclature and methods of stratigraphic correlation.
Mentorship/Outreach
- Courses taught at George Washington University, Indiana University, University of Kansas, University of Oslo, George Mason University, Türkiye Petrolleri AO.
Professional Experience
1974, 1975 (summers) Biostratigrapher, Exxon Production Research Co., Houston, TX
1977-2018 Research Geologist, U.S. Geological Survey, Reston, VA
2018-present Scientist Emerita, U.S. Geological Survey, Reston, VA
Education and Certifications
B.A. (Honors College), 1972, Geology, University of Oregon
Ph. D., 1977, Geological Sciences, University of California, Riverside
Affiliations and Memberships*
American Association for Advancement of Science (Fellow)
Geological Society of America (Fellow)
North American Micropaleontology Section of the Society for Sedimentary Geology
The Paleontological Society (Fellow)
The Palynological Society
American Geophysical Union
USGS representative to North American Commission on Stratigraphic Nomenclature
Science and Products
Rock-avalanche and ocean-resurge deposits in the late Eocene Chesapeake Bay impact structure: Evidence from the ICDP-USGS Eyreville cores, Virginia, USA
Geologic columns for the ICDP-USGS Eyreville A and B cores, Chesapeake Bay impact structure: Sediment-clast breccias, 1096 to 444 m depth
Postimpact deposition in the Chesapeake Bay impact structure: Variations in eustasy, compaction, sediment supply, and passive-aggressive tectonism
Report 11 - Revised articles of organization and procedure of the North American commission on stratigraphic nomenclature
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
Integrated sequence stratigraphy of the postimpact sediments from the Eyreville core holes, Chesapeake Bay impact structure inner basin
Supplemental materials for the ICDP-USGS Eyreville A, B, and C core holes, Chesapeake Bay impact structure: Core-box photographs, coring-run tables, and depth-conversion files
Impact effects and regional tectonic insights: Backstripping the Chesapeake Bay impact structure
Occurrences of calcareous nannofossil, dinoflagellate cyst, and pollen taxa in Paleocene strate in South Carolina
Site Report for USGS Test Holes Drilled at Cape Charles, Northampton County, Virginia, in 2004
Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA
A new species of Pentadinium from Eastern Anatolia, Turkey, Pentadinium galileoi
Science and Products
- Maps
- Multimedia
- Publications
Filter Total Items: 105
Rock-avalanche and ocean-resurge deposits in the late Eocene Chesapeake Bay impact structure: Evidence from the ICDP-USGS Eyreville cores, Virginia, USA
An unusually thick section of sedimentary breccias dominated by target-sediment clasts is a distinctive feature of the late Eocene Chesapeake Bay impact structure. A cored 1766-m-deep section recovered from the central part of this marine-target structure by the International Continental Scientific Drilling Program (ICDP)-U.S. Geological Survey (USGS) drilling project contains 678 m of these breccAuthorsGregory Gohn, David S. Powars, H. Dypvik, Lucy E. EdwardsGeologic columns for the ICDP-USGS Eyreville A and B cores, Chesapeake Bay impact structure: Sediment-clast breccias, 1096 to 444 m depth
The Eyreville A and B cores, recovered from the “moat” of the Chesapeake Bay impact structure, provide a thick section of sediment-clast breccias and minor stratified sediments from 1095.74 to 443.90 m. This paper discusses the components of these breccias, presents a geologic column and descriptive lithologic framework for them, and formalizes the Exmore Formation. From 1095.74 to ~867 m, the corAuthorsLucy E. Edwards, David S. Powars, Gregory Gohn, H. DypvikPostimpact deposition in the Chesapeake Bay impact structure: Variations in eustasy, compaction, sediment supply, and passive-aggressive tectonism
The Eyreville and Exmore, Virginia, core holes were drilled in the inner basin and annular trough, respectively, of the Chesapeake Bay impact structure, and they allow us to evaluate sequence deposition in an impact crater. We provide new high-resolution geochronologic (<1 Ma) and sequence-stratigraphic interpretations of the Exmore core, identify 12 definite (and four possible) postimpact depositAuthorsA.A. Kulpecz, K.G. Miller, J.V. Browning, Lucy E. Edwards, David S. Powars, P.P. McLaughlin, A.D. Harris, M.D. FeigensonReport 11 - Revised articles of organization and procedure of the North American commission on stratigraphic nomenclature
No abstract available.AuthorsD.E. Owen, N.P. Lasca, Lucy E. EdwardsComparison 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
Collapse and inward slumping of unconsolidated sedimentary strata expanded the Chesapeake Bay impact structure far beyond its central basement crater. During crater collapse, sediment-loaded water surged back to fill the crater. Here, we analyze clast frequency and granulometry of these resurge deposits in one core hole from the outermost part of the collapsed zone (i.e., Langley) as well as a corAuthorsJens Ormo, Erik Sturkell, J. Wright Horton,, David S. Powars, Lucy E. EdwardsIntegrated sequence stratigraphy of the postimpact sediments from the Eyreville core holes, Chesapeake Bay impact structure inner basin
The Eyreville core holes provide the first continuously cored record of postimpact sequences from within the deepest part of the central Chesapeake Bay impact crater. We analyzed the upper Eocene to Pliocene postimpact sediments from the Eyreville A and C core holes for lithology (semiquantitative measurements of grain size and composition), sequence stratigraphy, and chronostratigraphy. Age is baAuthorsJames V. Browning, K.G. Miller, P.P. McLaughlin, Lucy E. Edwards, A.A. Kulpecz, David S. Powars, B.S. Wade, M.D. Feigenson, J.D. WrightSupplemental materials for the ICDP-USGS Eyreville A, B, and C core holes, Chesapeake Bay impact structure: Core-box photographs, coring-run tables, and depth-conversion files
During 2005-2006, the International Continental Scientific Drilling Program and the U.S. Geological Survey drilled three continuous core holes into the Chesapeake Bay impact structure to a total depth of 1766.3 m. A collection of supplemental materials that presents a record of the core recovery and measurement data for the Eyreville cores is available on CD-ROM at the end of this volume and in thAuthorsC.T. Durand, Lucy E. Edwards, M.L. Malinconico, David S. PowarsImpact effects and regional tectonic insights: Backstripping the Chesapeake Bay impact structure
The Chesapeake Bay impact structure is a ca. 35.4 Ma crater located on the eastern seaboard of North America. Deposition returned to normal shortly after impact, resulting in a unique record of both impact-related and subsequent passive margin sedimentation. We use backstripping to show that the impact strongly affected sedimentation for 7 m.y. through impact-derived crustal-scale tectonics, dominAuthorsT. Hayden, M. Kominz, David S. Powars, Lucy E. Edwards, K.G. Miller, J.V. Browning, A.A. KulpeczOccurrences of calcareous nannofossil, dinoflagellate cyst, and pollen taxa in Paleocene strate in South Carolina
This report presents 26 diagrams showing the occurrences of fossil dinocyst, calcareous nannofossil, and pollen assemblages in Paleocene samples from 15 boreholes in South Carolina.AuthorsNorman O. Frederiksen, Lucy E. Edwards, Laurel M. Bybell, Jean M. Self-TrailSite Report for USGS Test Holes Drilled at Cape Charles, Northampton County, Virginia, in 2004
The U.S. Geological Survey drilled two test holes near Cape Charles, Virginia, during May and June 2004, as part of an investigation of the buried, late Eocene Chesapeake Bay impact structure. The first hole is designated as the USGS-Sustainable Technology Park test hole #1 (USGS-STP1). This test hole was abandoned at a depth of 300 ft; cuttings samples were collected, but no cores or geophysicalAuthorsGregory S. Gohn, Ward E. Sanford, David S. Powars, J. Wright Horton, Lucy E. Edwards, Roger H. Morin, Jean M. Self-TrailOrigin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA
The late Eocene Chesapeake Bay impact structure, located on the Atlantic margin of Virginia, may be Earth's best-preserved large impact structure formed in a shallow marine, siliciclastic, continental-shelf environment. It has the form of an inverted sombrero in which a central crater ∼40 km in diameter is surrounded by a shallower brim, the annular trough, that extends the diameter to ∼85 km. TheAuthorsJ. Wright Horton,, Gregory Gohn, David S. Powars, Lucy E. EdwardsA new species of Pentadinium from Eastern Anatolia, Turkey, Pentadinium galileoi
The new gonyaulacoid dinoflagellate Pentadinium galileoi Sancay et al., sp. nov. from the Oligocene-Lower Miocene sediments of Eastern Anatolia has been identified. It is spherical, chordate with prominant discoidal cingulum and distally furcate apical, sulcal, and antapical processes. It has a type P(3???) archeopyle, and periarcheopyle is larger than endoarcheopyle. Tabulation is distinct and itAuthorsR.H. Sancay, Z. Bati, Lucy E. Edwards, K.I. Ertug
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government