Fractures in bedrock transmit groundwater, and geologic mapping is conducted to provide the geologic framework for groundwater resource studies. This photo shows iron-oxide staining (Leisegang banding) from past groundwater flow along fractures formed prior to the rock having been blasted open during road construction.
Daniel H Doctor, Ph.D.
Daniel H. Doctor is a Research Geologist at the Florence Bascom Geoscience Center.
Dan is a research geologist conducting geologic mapping and specialized geologic research for the Appalachian Basin project. His current research interests include stratigraphy of the Appalachian Basin, landscape evolution within the Appalachian Valley and Ridge physiographic province, karst hydrology and geomorphology, sinkhole hazard studies, and paleoclimate records from karst regions.
Dan began a career with the USGS in 2002 as an NRC postdoc within the Isotope Tracers of Biogeochemical and Hydrologic Processes project of the National Research Program in Menlo Park, California. In 2006, he joined the Florence Bascom Geoscience Center in Reston, Virginia.
Professional Experience
Research Geologist (2006-present). U.S. Geological Survey, KARST Project, Eastern Geology and Paleoclimate Science Center, Reston, VA
Hydrologist (2004-2006). U.S. Geological Survey, Isotope Tracers Group, Water Resources Division, Menlo Park, CA
Postdoctoral Research Associate, National Research Council (NRC) (2002-2004). U.S. Geological Survey, Isotope Tracers Group, Water Resources Division, Menlo Park, CA
Project Analyst (2001). Lands and Minerals Division, Minnesota Department of Natural Resources (MN-DNR).
Education and Certifications
Ph.D. (2002) in Hydrogeology/Geochemistry, with Doctoral Minor in Water Resources Science, University of Minnesota, Dept. of Geology and Geophysics, Minneapolis, MN
Bachelor of Arts (1994) in Geology, Minor in Environmental Studies, Colgate University, Hamilton, NY (Magna Cum Laude, Phi Beta Kappa)
Science and Products
Appalachian Basin Geologic Mapping Project
Subsidence Susceptibility Map for the Conterminous U.S.
Enhanced Terrain Imagery of the Staunton 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Front Royal 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Buena Vista 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Cumberland 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Cosmogenic Be-10 Exposure Data for a Boulder Field in Zepp, VA
Enhanced Terrain Imagery of the Lewisburg 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Marlinton 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Beckley 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Bluefield 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Roanoke 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
A geodatabase of Woodruff, K.D., and Christopher, M.J., 1982, Thickness of Regolith in the Delaware Piedmont: Delaware Geological Survey Open File Report No. 19, scale 1:24,000.
Enhanced Terrain Imagery of the Carlisle 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Geologic maps of the Stephenson and Winchester quadrangles, Frederick and Clarke Counties, Virginia, and Inwood and White Hall quadrangles, Berkeley and Jefferson Counties, West Virginia
Geologic map of the Hayfield quadrangle, Frederick County, Virginia
![Groundwater staining in Pennsylvanian sandstone. A rock hammer is used as size reference.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/Groundwater%20staining%20in%20Pennsylvanian%20sandstone_rock%20hammer_PANO.jpg?itok=uec-Msbp)
Fractures in bedrock transmit groundwater, and geologic mapping is conducted to provide the geologic framework for groundwater resource studies. This photo shows iron-oxide staining (Leisegang banding) from past groundwater flow along fractures formed prior to the rock having been blasted open during road construction.
Hydrogeology, karst, and groundwater availability of Monroe County, West Virginia
Current and future sinkhole susceptibility in karst and pseudokarst areas of the conterminous United States
Exploring the influence of input feature space on CNN-based geomorphic feature extraction from digital terrain data
Rapid estimation of minimum depth-to-bedrock from lidar leveraging deep-learning-derived surficial material maps
A multiscale approach for monitoring groundwater discharge to headwater streams by the U.S. Geological Survey Next Generation Water Observing System Program—An example from the Neversink Reservoir watershed, New York
Karst geology of the Upper Midwest, USA
Progress toward a preliminary karst depression density map for the conterminous United States
Appalachian Basin stratigraphy, tectonics, and eustasy from the Blue Ridge to the Allegheny Front, Virginia and West Virginia
New insight into the origin of manganese oxide ore deposits in the Appalachian Valley and Ridge of northeastern Tennessee and northern Virginia, USA
Manganese oxide deposits have long been observed in association with carbonates within the Appalachian Mountains, but their origin has remained enigmatic for well over a century. Ore deposits of Mn oxides from several productive sites located in eastern Tennessee and northern Virginia display morphologies that include botryoidal and branching forms, massive nodules, breccia matrix cements, and fra
Hypogene caves of the central Appalachian Shenandoah Valley in Virginia
Predicting the occurrence of cave-inhabiting fauna based on features of the earth surface environment
Science and Products
Appalachian Basin Geologic Mapping Project
Subsidence Susceptibility Map for the Conterminous U.S.
Enhanced Terrain Imagery of the Staunton 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Front Royal 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Buena Vista 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Cumberland 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Cosmogenic Be-10 Exposure Data for a Boulder Field in Zepp, VA
Enhanced Terrain Imagery of the Lewisburg 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Marlinton 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Beckley 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Bluefield 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Enhanced Terrain Imagery of the Roanoke 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
A geodatabase of Woodruff, K.D., and Christopher, M.J., 1982, Thickness of Regolith in the Delaware Piedmont: Delaware Geological Survey Open File Report No. 19, scale 1:24,000.
Enhanced Terrain Imagery of the Carlisle 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution
Geologic maps of the Stephenson and Winchester quadrangles, Frederick and Clarke Counties, Virginia, and Inwood and White Hall quadrangles, Berkeley and Jefferson Counties, West Virginia
Geologic map of the Hayfield quadrangle, Frederick County, Virginia
![Groundwater staining in Pennsylvanian sandstone. A rock hammer is used as size reference.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/Groundwater%20staining%20in%20Pennsylvanian%20sandstone_rock%20hammer_PANO.jpg?itok=uec-Msbp)
Fractures in bedrock transmit groundwater, and geologic mapping is conducted to provide the geologic framework for groundwater resource studies. This photo shows iron-oxide staining (Leisegang banding) from past groundwater flow along fractures formed prior to the rock having been blasted open during road construction.
Fractures in bedrock transmit groundwater, and geologic mapping is conducted to provide the geologic framework for groundwater resource studies. This photo shows iron-oxide staining (Leisegang banding) from past groundwater flow along fractures formed prior to the rock having been blasted open during road construction.
Hydrogeology, karst, and groundwater availability of Monroe County, West Virginia
Current and future sinkhole susceptibility in karst and pseudokarst areas of the conterminous United States
Exploring the influence of input feature space on CNN-based geomorphic feature extraction from digital terrain data
Rapid estimation of minimum depth-to-bedrock from lidar leveraging deep-learning-derived surficial material maps
A multiscale approach for monitoring groundwater discharge to headwater streams by the U.S. Geological Survey Next Generation Water Observing System Program—An example from the Neversink Reservoir watershed, New York
Karst geology of the Upper Midwest, USA
Progress toward a preliminary karst depression density map for the conterminous United States
Appalachian Basin stratigraphy, tectonics, and eustasy from the Blue Ridge to the Allegheny Front, Virginia and West Virginia
New insight into the origin of manganese oxide ore deposits in the Appalachian Valley and Ridge of northeastern Tennessee and northern Virginia, USA
Manganese oxide deposits have long been observed in association with carbonates within the Appalachian Mountains, but their origin has remained enigmatic for well over a century. Ore deposits of Mn oxides from several productive sites located in eastern Tennessee and northern Virginia display morphologies that include botryoidal and branching forms, massive nodules, breccia matrix cements, and fra