Hydrologic technician showing a high-water mark on a debris line
Hydrologic technician showing a high-water mark on a debris lineHydrologic technician showing a high-water mark on a debris line next to the Black River in Ludlow Vermont.
Gregory Walsh
I am a Project Leader and a Supervisory Research Geologist with the Florence Bascom Geoscience Center. I manage bedrock geologic mapping activities for the USGS in the northeastern United States. I managed two international mapping projects in Morocco, the completion of the new bedrock geologic map of Vermont, and I conducted mapping Madagascar.
I have expertise in geologic mapping, structural geology, geochronology, tectonics, digital cartography, and GIS. I specialize in the mapping, structure, and tectonics of complexly deformed rocks, the integration of geologic data with hydrogeologic and mineral resource assessment studies, and the use of GIS as a mapping and analysis tool. I have trained students and geologists in geologic mapping, GIS, GPS, digital mapping, and U-Pb geochronology by SHRIMP. The Publications listed on the tab below is automatically generated and incomplete. Please contact me if you would like a copy of my current CV.
Science and Products
Northeast Bedrock Mapping Project
The USGS is conducting geologic mapping and scientific research of complexly deformed crystalline igneous and metamorphic rocks in the Northeastern United States. Current mapping activities are focused on 1:24,000-scale mapping in New Hampshire, Vermont, Connecticut, and New York, plus regionwide 1:500,000-scale compilation of the bedrock geology of New England. The project produces high-quality...
Hydrologic technician showing a high-water mark on a debris line
Hydrologic technician showing a high-water mark on a debris line
Hydrologic technician showing a high-water mark on a debris lineHydrologic technician showing a high-water mark on a debris line next to the Black River in Ludlow Vermont.
Langdon Street Bridge stream gage 04285800 on the North Branch Winooski River
Langdon Street Bridge stream gage 04285800 on the North Branch Winooski RiverLangdon Street Bridge stream gage 04285800 on the North Branch Winooski River
Langdon Street Bridge stream gage 04285800 on the North Branch Winooski River
Langdon Street Bridge stream gage 04285800 on the North Branch Winooski RiverLangdon Street Bridge stream gage 04285800 on the North Branch Winooski River
High-water mark on door at Montpelier, Vermont Federal Building
High-water mark on door at Montpelier, Vermont Federal BuildingHigh-water mark on door at Montpelier, Vermont Federal Building during major flood event in July 2023.
High-water mark on door at Montpelier, Vermont Federal Building
High-water mark on door at Montpelier, Vermont Federal BuildingHigh-water mark on door at Montpelier, Vermont Federal Building during major flood event in July 2023.
High-water mark on door at Federal Building, Montpelier, Vermont
High-water mark on door at Federal Building, Montpelier, VermontHigh-water mark on door at Federal Building, Montpelier, Vermont during major flood event in July 2023.
High-water mark on door at Federal Building, Montpelier, Vermont
High-water mark on door at Federal Building, Montpelier, VermontHigh-water mark on door at Federal Building, Montpelier, Vermont during major flood event in July 2023.
Flooded stairwell to Montpelier, Vermont Federal Building
Flooded stairwell to Montpelier, Vermont Federal BuildingFlooded stairwell to Montpelier, Vermont Federal Building during historical flood event.
Flooded stairwell to Montpelier, Vermont Federal Building
Flooded stairwell to Montpelier, Vermont Federal BuildingFlooded stairwell to Montpelier, Vermont Federal Building during historical flood event.
Autumn colors reflected on Paradox Lake in the Adirondack Mountains
Autumn colors reflected on Paradox Lake in the Adirondack MountainsThe Northeast Bedrock Mapping Project consists of scientists conducting geologic mapping and scientific research of complexly deformed crystalline igneous and metamorphic rocks in the Northeastern United States. Current mapping activities are focused in New Hampshire, Vermont, Connecticut, and New York.
Autumn colors reflected on Paradox Lake in the Adirondack Mountains
Autumn colors reflected on Paradox Lake in the Adirondack MountainsThe Northeast Bedrock Mapping Project consists of scientists conducting geologic mapping and scientific research of complexly deformed crystalline igneous and metamorphic rocks in the Northeastern United States. Current mapping activities are focused in New Hampshire, Vermont, Connecticut, and New York.
Science and Products
Northeast Bedrock Mapping Project
The USGS is conducting geologic mapping and scientific research of complexly deformed crystalline igneous and metamorphic rocks in the Northeastern United States. Current mapping activities are focused on 1:24,000-scale mapping in New Hampshire, Vermont, Connecticut, and New York, plus regionwide 1:500,000-scale compilation of the bedrock geology of New England. The project produces high-quality...
Hydrologic technician showing a high-water mark on a debris line
Hydrologic technician showing a high-water mark on a debris lineHydrologic technician showing a high-water mark on a debris line next to the Black River in Ludlow Vermont.
Hydrologic technician showing a high-water mark on a debris line
Hydrologic technician showing a high-water mark on a debris lineHydrologic technician showing a high-water mark on a debris line next to the Black River in Ludlow Vermont.
Langdon Street Bridge stream gage 04285800 on the North Branch Winooski River
Langdon Street Bridge stream gage 04285800 on the North Branch Winooski RiverLangdon Street Bridge stream gage 04285800 on the North Branch Winooski River
Langdon Street Bridge stream gage 04285800 on the North Branch Winooski River
Langdon Street Bridge stream gage 04285800 on the North Branch Winooski RiverLangdon Street Bridge stream gage 04285800 on the North Branch Winooski River
High-water mark on door at Montpelier, Vermont Federal Building
High-water mark on door at Montpelier, Vermont Federal BuildingHigh-water mark on door at Montpelier, Vermont Federal Building during major flood event in July 2023.
High-water mark on door at Montpelier, Vermont Federal Building
High-water mark on door at Montpelier, Vermont Federal BuildingHigh-water mark on door at Montpelier, Vermont Federal Building during major flood event in July 2023.
High-water mark on door at Federal Building, Montpelier, Vermont
High-water mark on door at Federal Building, Montpelier, VermontHigh-water mark on door at Federal Building, Montpelier, Vermont during major flood event in July 2023.
High-water mark on door at Federal Building, Montpelier, Vermont
High-water mark on door at Federal Building, Montpelier, VermontHigh-water mark on door at Federal Building, Montpelier, Vermont during major flood event in July 2023.
Flooded stairwell to Montpelier, Vermont Federal Building
Flooded stairwell to Montpelier, Vermont Federal BuildingFlooded stairwell to Montpelier, Vermont Federal Building during historical flood event.
Flooded stairwell to Montpelier, Vermont Federal Building
Flooded stairwell to Montpelier, Vermont Federal BuildingFlooded stairwell to Montpelier, Vermont Federal Building during historical flood event.
Autumn colors reflected on Paradox Lake in the Adirondack Mountains
Autumn colors reflected on Paradox Lake in the Adirondack MountainsThe Northeast Bedrock Mapping Project consists of scientists conducting geologic mapping and scientific research of complexly deformed crystalline igneous and metamorphic rocks in the Northeastern United States. Current mapping activities are focused in New Hampshire, Vermont, Connecticut, and New York.
Autumn colors reflected on Paradox Lake in the Adirondack Mountains
Autumn colors reflected on Paradox Lake in the Adirondack MountainsThe Northeast Bedrock Mapping Project consists of scientists conducting geologic mapping and scientific research of complexly deformed crystalline igneous and metamorphic rocks in the Northeastern United States. Current mapping activities are focused in New Hampshire, Vermont, Connecticut, and New York.
*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