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.
Professional Experience
1992-Present, Research Geologist, U.S. Geological Survey, Reston, Virginia and Montpelier, Vermont
1990-1992, Consulting Geologist, Heindel and Noyes, Inc., Burlington, Vermont
1988-1990, Contractor, Vermont Agency of Natural Resources, Waterbury, Vermont
1986-1988, Teaching Assistant, University of Vermont, Department of Geology, Burlington, Vermont
1986, NAGT Intern Geologist, U.S. Geological Survey, Menlo Park, California
Education and Certifications
M.S. in Geology / University of Vermont, Burlington, Vermont USA, 1989
B.S. in Geology / University of Massachusetts, Amherst, Massachusetts, 1986
Affiliations and Memberships*
2013-Present, Fellow, Geological Society of America
1988-2013, Member, Geological Society of America
2013-2014, Elected Vice-Chair, Geological Society of America, Northeastern Section Management Board
2014-2015, Chair, Geological Society of America, Northeastern Section Management Board
2015-2016, Past-Chair, Geological Society of America, Northeastern Section Management Board
2012-Present, Member, Connecticut Geological Society
1998-Present, Member, New Hampshire Geological Society
1992-Present, Member, Vermont Geological Society
Honors and Awards
Dean’s List five semesters (1982-1986)
Amoco Geophysics Award (1985)
NAGT – USGS Student Internship (1985)
L.R. Wilson Award, UMASS Amherst (1986)
Charles G. Doll Award, Vermont Geological Society (1988)
Twenty-one USGS performance awards (1997-2021)
Elected GSA Fellow (2013)
Science and Products
Bedrock geologic map of the Old Lyme quadrangle, New London and Middlesex Counties, Connecticut
Bedrock geologic map of the Littleton and Lower Waterford quadrangles, Essex and Caledonia Counties, Vermont, and Grafton County, New Hampshire
Bedrock geologic map of the Miles Pond and Concord quadrangles, Essex and Caledonia Counties, Vermont, and Grafton County, New Hampshire
Bedrock geologic map of the Lisbon quadrangle, and parts of the Sugar Hill and East Haverhill quadrangles, Grafton County, New Hampshire
A transect through Vermont’s most famous volcano – Mount Ascutney: GSNH Summer 2017 Field Trip
Reaction softening by dissolution–precipitation creep in a retrograde greenschist facies ductile shear zone, New Hampshire, USA
We describe strain localization by a mixed process of reaction and microstructural softening in a lower greenschist facies ductile fault zone that transposes and replaces middle to upper amphibolite facies fabrics and mineral assemblages in the host schist of the Littleton Formation near Claremont, New Hampshire. Here, Na-poor muscovite and chlorite progressively replace first staurolite, then gar
Identification of groundwater nitrate contamination from explosives used in road construction: Isotopic, chemical, and hydrologic evidence
Geochemistry and origin of metamorphosed mafic rocks from the Lower Paleozoic Moretown and Cram Hill Formations of North-Central Vermont: Delamination magmatism in the western New England appalachians
Neoproterozoic–Cambrian stratigraphic framework of the Anti-Atlas and Ouzellagh promontory (High Atlas), Morocco
Telescoping metamorphic isograds: Evidence from 40Ar/39A dating in the Orange-Milford belt, southern Connecticut
Unraveling Alleghanian orogenesis in southern Connecticut: The history of the Lyme Dome
A transect through the base of the Bronson Hill Terrane in western New Hampshire
Neoproterozoic tectonic evolution of the Jebel Saghro and Bou Azzer - El Graara inliers, eastern and central Anti-Atlas, Morocco
Science and Products
Bedrock geologic map of the Old Lyme quadrangle, New London and Middlesex Counties, Connecticut
Bedrock geologic map of the Littleton and Lower Waterford quadrangles, Essex and Caledonia Counties, Vermont, and Grafton County, New Hampshire
Bedrock geologic map of the Miles Pond and Concord quadrangles, Essex and Caledonia Counties, Vermont, and Grafton County, New Hampshire
Bedrock geologic map of the Lisbon quadrangle, and parts of the Sugar Hill and East Haverhill quadrangles, Grafton County, New Hampshire
A transect through Vermont’s most famous volcano – Mount Ascutney: GSNH Summer 2017 Field Trip
Reaction softening by dissolution–precipitation creep in a retrograde greenschist facies ductile shear zone, New Hampshire, USA
We describe strain localization by a mixed process of reaction and microstructural softening in a lower greenschist facies ductile fault zone that transposes and replaces middle to upper amphibolite facies fabrics and mineral assemblages in the host schist of the Littleton Formation near Claremont, New Hampshire. Here, Na-poor muscovite and chlorite progressively replace first staurolite, then gar
Identification of groundwater nitrate contamination from explosives used in road construction: Isotopic, chemical, and hydrologic evidence
Geochemistry and origin of metamorphosed mafic rocks from the Lower Paleozoic Moretown and Cram Hill Formations of North-Central Vermont: Delamination magmatism in the western New England appalachians
Neoproterozoic–Cambrian stratigraphic framework of the Anti-Atlas and Ouzellagh promontory (High Atlas), Morocco
Telescoping metamorphic isograds: Evidence from 40Ar/39A dating in the Orange-Milford belt, southern Connecticut
Unraveling Alleghanian orogenesis in southern Connecticut: The history of the Lyme Dome
A transect through the base of the Bronson Hill Terrane in western New Hampshire
Neoproterozoic tectonic evolution of the Jebel Saghro and Bou Azzer - El Graara inliers, eastern and central Anti-Atlas, Morocco
*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