Mineralized silicified cataclasite (fault rock) from the Roanoke Rapids terrane in southeastern Virginia. This rock contains abundant pyrite, as well as traces of gold, silver, and telluride minerals.
Mark W Carter
Mark W. Carter is a Research Geologist at the Florence Bascom Geoscience Center.
Mark Wayne Carter has been a professional geologist since 1996. After an education at Old Dominion University (B.S.) and University of Tennessee, Knoxville (M.S.), Mark began his career in 1996 with the North Carolina Geological Survey in Asheville, mapping throughout the Blue Ridge and parts of the Chauga belt in western North Carolina. In 2004, Mark moved to the Virginia Division of Geology and Mineral Resources in Charlottesville, expanding his mapping experience with several projects in the eastern Piedmont and inner Coastal Plain provinces near Richmond, as well as in the Virginia Blue Ridge. Mark came on board with the US Geological Survey in 2009 as a team member of the Eastern Geology and Paleoclimate Science Center, Appalachian Blue Ridge Project, mapping along the Blue Ridge Parkway in Virginia. In 2011, Mark served as local USGS coordinator for USGS response following the Mineral, Virginia earthquake, and has been Project Chief for several USGS National Cooperative Mapping Program projects, including "Geologic Framework for Seismic Hazards in Central Virginia and eastern US: Targeted Geologic Mapping and Synthesis" (2014-2018), “Piedmont Geology along the southeastern Fall Zone, Virginia and North Carolina” (2018-2020), “Piedmont and Blue Ridge” (2020-2024), and is currently Project Chief for the NCGMP “Eastern Piedmont and upper Coastal Plain, Virginia to Georgia” project (2024-present). Mark is mapping in southeastern Virginia, northeastern North Carolina, and on the Piedmont National Wildlife Refuge, Bond Swamp National Wildlife Refuge and parts of Oconee National Forest in central Georgia. Mark’s geologic mapping efforts combine geochemical, geophysical, LiDAR and numerous geochronologic methods to understand the formation and evolution of the southern Appalachian orogen and its Atlantic Coastal Plain cover, with an emphasis on critical mineral resources and geologic hazards.
Science and Products
Geology of the eastern Piedmont and upper Coastal Plain along the Fall Zone, Virginia to Georgia
Piedmont and Blue Ridge Project
Geologic Framework for Seismic Hazards in Central Virginia
Luminescence and Radiocarbon data for: Geologic map of the Big Levels Quadrangle, Virginia Luminescence and Radiocarbon data for: Geologic map of the Big Levels Quadrangle, Virginia
Luminescence and Radiocarbon data for: Geologic Map of the Sparta East, Sparta West, and parts of the Glade Valley and Whitehead 7.5-minute quadrangles, North Carolina and Virginia, and the epicentral area of the August 9, 2020, Mw 5.1 earthquake in Spart Luminescence and Radiocarbon data for: Geologic Map of the Sparta East, Sparta West, and parts of the Glade Valley and Whitehead 7.5-minute quadrangles, North Carolina and Virginia, and the epicentral area of the August 9, 2020, Mw 5.1 earthquake in Spart
Rare Earth Element (REE), Critical Mineral, and Geochemical Characterization of Manganese Oxide Ore Deposits in the Virginia Piedmont and Valley & Ridge Rare Earth Element (REE), Critical Mineral, and Geochemical Characterization of Manganese Oxide Ore Deposits in the Virginia Piedmont and Valley & Ridge
Geochemical data, thin section images, and modal mineralogy of selected bedrock samples in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina Geochemical data, thin section images, and modal mineralogy of selected bedrock samples in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina
Geodatabase for the geologic map of the Buckner 7.5-minute quadrangle, Louisa County, Virginia Geodatabase for the geologic map of the Buckner 7.5-minute quadrangle, Louisa County, Virginia
Rare Earth Element (REE), Critical Mineral, and Geochemical Characterization of Manganese Oxide Ore Deposits in the Appalachian Mountains of Tennessee, Virginia, and West Virginia Rare Earth Element (REE), Critical Mineral, and Geochemical Characterization of Manganese Oxide Ore Deposits in the Appalachian Mountains of Tennessee, Virginia, and West Virginia
Major and trace element geochemical data for the Petersburg Granite (sensu stricto), Pocoshock Creek Gneiss, and related Appalachian igneous rocks Major and trace element geochemical data for the Petersburg Granite (sensu stricto), Pocoshock Creek Gneiss, and related Appalachian igneous rocks
Geochemistry of mafic and ultramafic rocks in the Eastern Blue Ridge of Virginia and North Carolina (ver. 2.0, September 2025) Geochemistry of mafic and ultramafic rocks in the Eastern Blue Ridge of Virginia and North Carolina (ver. 2.0, September 2025)
238U/206Pb SHRIMP, 40Ar/39Ar geochronologic, and geochemical data from the Central Virginia Piedmont 238U/206Pb SHRIMP, 40Ar/39Ar geochronologic, and geochemical data from the Central Virginia Piedmont
Cosmogenic Al-26/Be-10 Isochron Burial Data for the Sparta, NC Area Cosmogenic Al-26/Be-10 Isochron Burial Data for the Sparta, NC Area
Whole Rock Geochemistry and Uranium Lead Isotopic Data from the Dinwiddie Terrane, Virginia, USA Whole Rock Geochemistry and Uranium Lead Isotopic Data from the Dinwiddie Terrane, Virginia, USA
Database for the Preliminary Geologic Map of the Cherry Hill Quadrangle, Dinwiddie, Sussex, and Greensville Counties, Virginia Database for the Preliminary Geologic Map of the Cherry Hill Quadrangle, Dinwiddie, Sussex, and Greensville Counties, Virginia
Geologic map of the Buckner 7.5-Minute quadrangle, Louisa County, Virginia Geologic map of the Buckner 7.5-Minute quadrangle, Louisa County, Virginia
Mineralized silicified cataclasite (fault rock) from the Roanoke Rapids terrane in southeastern Virginia. This rock contains abundant pyrite, as well as traces of gold, silver, and telluride minerals.
A Cessna Grand Caravan airplane took measurements over Virginia's Louisa, Goochland and Fluvanna counties. The data collected will help USGS scientists locate buried geologic features associated with the August 23, 2011 earthquake and its aftershocks. Surveys were conducted from 7/15- 7/25.
A Cessna Grand Caravan airplane took measurements over Virginia's Louisa, Goochland and Fluvanna counties. The data collected will help USGS scientists locate buried geologic features associated with the August 23, 2011 earthquake and its aftershocks. Surveys were conducted from 7/15- 7/25.
A Cessna Grand Caravan airplane took measurements over Virginia's Louisa, Goochland and Fluvanna counties. The data collected will help USGS scientists locate buried geologic features associated with the August 23, 2011 earthquake and its aftershocks. Surveys were conducted from 7/15- 7/25.
A Cessna Grand Caravan airplane took measurements over Virginia's Louisa, Goochland and Fluvanna counties. The data collected will help USGS scientists locate buried geologic features associated with the August 23, 2011 earthquake and its aftershocks. Surveys were conducted from 7/15- 7/25.
Mesoproterozoic to Paleozoic tectonics, Pleistocene landforms, and Holocene seismicity in the Blue Ridge: Results from integrated studies of the 9 August 2020, Mw 5.1 earthquake area near Sparta, North Carolina, USA Mesoproterozoic to Paleozoic tectonics, Pleistocene landforms, and Holocene seismicity in the Blue Ridge: Results from integrated studies of the 9 August 2020, Mw 5.1 earthquake area near Sparta, North Carolina, USA
Preliminary map of the surface rupture from the August 9, 2020, Mw 5.1 earthquake near Sparta, North Carolina—The Little River fault and other possible coseismic features Preliminary map of the surface rupture from the August 9, 2020, Mw 5.1 earthquake near Sparta, North Carolina—The Little River fault and other possible coseismic features
Redefinition of the Petersburg batholith and implications for crustal inheritance in the Dinwiddie terrane, Virginia, USA Redefinition of the Petersburg batholith and implications for crustal inheritance in the Dinwiddie terrane, Virginia, USA
Implementation plan of the National Cooperative Geologic Mapping Program strategy — Appalachian Piedmont and Blue Ridge Provinces Implementation plan of the National Cooperative Geologic Mapping Program strategy — Appalachian Piedmont and Blue Ridge Provinces
Preliminary geologic map of the Cherry Hill quadrangle, Dinwiddie, Sussex, and Greensville Counties, Virginia Preliminary geologic map of the Cherry Hill quadrangle, Dinwiddie, Sussex, and Greensville Counties, Virginia
Stop 3 – The Petersburg “Granite” redefined: Recognition and implications of Silurian to Devonian rocks in central-eastern Virginia Stop 3 – The Petersburg “Granite” redefined: Recognition and implications of Silurian to Devonian rocks in central-eastern Virginia
The liquefaction record of past earthquakes in the Central Virginia Seismic Zone, Eastern United States The liquefaction record of past earthquakes in the Central Virginia Seismic Zone, Eastern United States
River terrace evidence of tectonic processes in the eastern North American plate interior, South Anna River, Virginia River terrace evidence of tectonic processes in the eastern North American plate interior, South Anna River, Virginia
Foreward: Geology Field Trips in and around the U.S. Capital Foreward: Geology Field Trips in and around the U.S. Capital
Geochronologic age constraints on tectonostratigraphic units of the central Virginia Piedmont, USA Geochronologic age constraints on tectonostratigraphic units of the central Virginia Piedmont, USA
Paleoliquefaction field reconnaissance in eastern North Carolina—Is there evidence for large magnitude earthquakes between the central Virginia seismic zone and Charleston seismic zone? Paleoliquefaction field reconnaissance in eastern North Carolina—Is there evidence for large magnitude earthquakes between the central Virginia seismic zone and Charleston seismic zone?
Geology of the Cornwall Quadrangle, Virginia Geology of the Cornwall Quadrangle, Virginia
Science and Products
Geology of the eastern Piedmont and upper Coastal Plain along the Fall Zone, Virginia to Georgia
Piedmont and Blue Ridge Project
Geologic Framework for Seismic Hazards in Central Virginia
Luminescence and Radiocarbon data for: Geologic map of the Big Levels Quadrangle, Virginia Luminescence and Radiocarbon data for: Geologic map of the Big Levels Quadrangle, Virginia
Luminescence and Radiocarbon data for: Geologic Map of the Sparta East, Sparta West, and parts of the Glade Valley and Whitehead 7.5-minute quadrangles, North Carolina and Virginia, and the epicentral area of the August 9, 2020, Mw 5.1 earthquake in Spart Luminescence and Radiocarbon data for: Geologic Map of the Sparta East, Sparta West, and parts of the Glade Valley and Whitehead 7.5-minute quadrangles, North Carolina and Virginia, and the epicentral area of the August 9, 2020, Mw 5.1 earthquake in Spart
Rare Earth Element (REE), Critical Mineral, and Geochemical Characterization of Manganese Oxide Ore Deposits in the Virginia Piedmont and Valley & Ridge Rare Earth Element (REE), Critical Mineral, and Geochemical Characterization of Manganese Oxide Ore Deposits in the Virginia Piedmont and Valley & Ridge
Geochemical data, thin section images, and modal mineralogy of selected bedrock samples in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina Geochemical data, thin section images, and modal mineralogy of selected bedrock samples in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina
Geodatabase for the geologic map of the Buckner 7.5-minute quadrangle, Louisa County, Virginia Geodatabase for the geologic map of the Buckner 7.5-minute quadrangle, Louisa County, Virginia
Rare Earth Element (REE), Critical Mineral, and Geochemical Characterization of Manganese Oxide Ore Deposits in the Appalachian Mountains of Tennessee, Virginia, and West Virginia Rare Earth Element (REE), Critical Mineral, and Geochemical Characterization of Manganese Oxide Ore Deposits in the Appalachian Mountains of Tennessee, Virginia, and West Virginia
Major and trace element geochemical data for the Petersburg Granite (sensu stricto), Pocoshock Creek Gneiss, and related Appalachian igneous rocks Major and trace element geochemical data for the Petersburg Granite (sensu stricto), Pocoshock Creek Gneiss, and related Appalachian igneous rocks
Geochemistry of mafic and ultramafic rocks in the Eastern Blue Ridge of Virginia and North Carolina (ver. 2.0, September 2025) Geochemistry of mafic and ultramafic rocks in the Eastern Blue Ridge of Virginia and North Carolina (ver. 2.0, September 2025)
238U/206Pb SHRIMP, 40Ar/39Ar geochronologic, and geochemical data from the Central Virginia Piedmont 238U/206Pb SHRIMP, 40Ar/39Ar geochronologic, and geochemical data from the Central Virginia Piedmont
Cosmogenic Al-26/Be-10 Isochron Burial Data for the Sparta, NC Area Cosmogenic Al-26/Be-10 Isochron Burial Data for the Sparta, NC Area
Whole Rock Geochemistry and Uranium Lead Isotopic Data from the Dinwiddie Terrane, Virginia, USA Whole Rock Geochemistry and Uranium Lead Isotopic Data from the Dinwiddie Terrane, Virginia, USA
Database for the Preliminary Geologic Map of the Cherry Hill Quadrangle, Dinwiddie, Sussex, and Greensville Counties, Virginia Database for the Preliminary Geologic Map of the Cherry Hill Quadrangle, Dinwiddie, Sussex, and Greensville Counties, Virginia
Geologic map of the Buckner 7.5-Minute quadrangle, Louisa County, Virginia Geologic map of the Buckner 7.5-Minute quadrangle, Louisa County, Virginia
Mineralized silicified cataclasite (fault rock) from the Roanoke Rapids terrane in southeastern Virginia. This rock contains abundant pyrite, as well as traces of gold, silver, and telluride minerals.
Mineralized silicified cataclasite (fault rock) from the Roanoke Rapids terrane in southeastern Virginia. This rock contains abundant pyrite, as well as traces of gold, silver, and telluride minerals.
A Cessna Grand Caravan airplane took measurements over Virginia's Louisa, Goochland and Fluvanna counties. The data collected will help USGS scientists locate buried geologic features associated with the August 23, 2011 earthquake and its aftershocks. Surveys were conducted from 7/15- 7/25.
A Cessna Grand Caravan airplane took measurements over Virginia's Louisa, Goochland and Fluvanna counties. The data collected will help USGS scientists locate buried geologic features associated with the August 23, 2011 earthquake and its aftershocks. Surveys were conducted from 7/15- 7/25.
A Cessna Grand Caravan airplane took measurements over Virginia's Louisa, Goochland and Fluvanna counties. The data collected will help USGS scientists locate buried geologic features associated with the August 23, 2011 earthquake and its aftershocks. Surveys were conducted from 7/15- 7/25.
A Cessna Grand Caravan airplane took measurements over Virginia's Louisa, Goochland and Fluvanna counties. The data collected will help USGS scientists locate buried geologic features associated with the August 23, 2011 earthquake and its aftershocks. Surveys were conducted from 7/15- 7/25.