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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

Filter Total Items: 18
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Filter Total Items: 15
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Filter Total Items: 81

A method for creating a three dimensional model from published geologic maps and cross sections A method for creating a three dimensional model from published geologic maps and cross sections

This brief report presents a relatively inexpensive and rapid method for creating a 3D model of geology from published quadrangle-scale maps and cross sections using Google Earth and Google SketchUp software. An example from the Green Mountains of Vermont, USA, is used to illustrate the step by step methods used to create such a model. A second example is provided from the Jebel Saghro...
Authors
Gregory J. Walsh
By
National Cooperative Geologic Mapping Program

Bedrock geology of the Montpelier area, central Vermont Bedrock geology of the Montpelier area, central Vermont

No abstract available.
Authors
Gregory J. Walsh, Jonathan Kim, Marjorie H. Gale
By
Florence Bascom Geoscience Center

Geological evolution of the Neoproterozoic Bemarivo Belt, northern Madagascar Geological evolution of the Neoproterozoic Bemarivo Belt, northern Madagascar

The broadly east-west trending, Late Neoproterozoic Bemarivo Belt in northern Madagascar has been re-surveyed at 1:100 000 scale as part of a large multi-disciplinary World Bank-sponsored project. The work included acquisition of 14 U-Pb zircon dates and whole-rock major and trace element geochemical data of representative rocks. The belt has previously been modelled as a juvenile...
Authors
Ronald J. Thomas, B. De Waele, D. I. Schofield, K. M. Goodenough, M. Horstwood, R. Tucker, W. Bauer, R. Annells, K. J. Howard, G. Walsh, M. Rabarimanana, J. M. Rafahatelo, A.V. Ralison, T. Randriamananjara
By
Florence Bascom Geoscience Center

Bedrock, Borehole, and Water-Quality Characterization of a Methane-Producing Water Well in Wolfeboro, New Hampshire Bedrock, Borehole, and Water-Quality Characterization of a Methane-Producing Water Well in Wolfeboro, New Hampshire

In August 2004, a commercial drill rig was destroyed by ignition of an explosive gas released during the drilling of a domestic well in granitic bedrock in Tyngsborough, MA. This accident prompted the Massachusetts Department of Environmental Protection (MassDEP) to sample the well water for dissolved methane - a possible explosive fuel. Water samples collected from the Tyngsborough...
Authors
James R. Degnan, Gregory J. Walsh, Sarah M. Flanagan, Robert A. Burruss
By
New England Water Science Center

Borehole Characterization of a Methane-Yielding Bedrock Well, Tyngsborough, Massachusetts Borehole Characterization of a Methane-Yielding Bedrock Well, Tyngsborough, Massachusetts

In August 2004, a domestic water well was drilled into granitoid metamorphic rocks 5.38 kilometers southwest of Tyngsborough, Massachusetts, on Scribner Hill. According to well driller Roger Skillings of Skillings and Sons, Inc. (oral commun., 2005), no water was encountered during drilling and when the borehole reached a depth of approximately 305.1 m, a blue flame exploded out of the...
Authors
Herbert A. Pierce, Gregory J. Walsh, Robert A. Burruss, James R. Degnan

Integrated multi‐scale characterization of ground‐water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire Integrated multi‐scale characterization of ground‐water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire

This chapter contains sections titled: Introduction Mirror Lake Site Fractures and Geologic Mapping Hydraulic Properties of Fractured Rock From Meters to Kilometers Chemical Migration in Fractured Rock Fracture Controls on Ground‐Water Flow and Chemical Transport at the Mirror Lake Site Summary
Authors
Allen M. Shapiro, Paul A. Hsieh, William C. Burton, Gregory J. Walsh
By
Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, Florence Bascom Geoscience Center

Science and Products

Filter Total Items: 18
No Result Found
Filter Total Items: 15
No results found.
Filter Total Items: 81

A method for creating a three dimensional model from published geologic maps and cross sections A method for creating a three dimensional model from published geologic maps and cross sections

This brief report presents a relatively inexpensive and rapid method for creating a 3D model of geology from published quadrangle-scale maps and cross sections using Google Earth and Google SketchUp software. An example from the Green Mountains of Vermont, USA, is used to illustrate the step by step methods used to create such a model. A second example is provided from the Jebel Saghro...
Authors
Gregory J. Walsh
By
National Cooperative Geologic Mapping Program

Bedrock geology of the Montpelier area, central Vermont Bedrock geology of the Montpelier area, central Vermont

No abstract available.
Authors
Gregory J. Walsh, Jonathan Kim, Marjorie H. Gale
By
Florence Bascom Geoscience Center

Geological evolution of the Neoproterozoic Bemarivo Belt, northern Madagascar Geological evolution of the Neoproterozoic Bemarivo Belt, northern Madagascar

The broadly east-west trending, Late Neoproterozoic Bemarivo Belt in northern Madagascar has been re-surveyed at 1:100 000 scale as part of a large multi-disciplinary World Bank-sponsored project. The work included acquisition of 14 U-Pb zircon dates and whole-rock major and trace element geochemical data of representative rocks. The belt has previously been modelled as a juvenile...
Authors
Ronald J. Thomas, B. De Waele, D. I. Schofield, K. M. Goodenough, M. Horstwood, R. Tucker, W. Bauer, R. Annells, K. J. Howard, G. Walsh, M. Rabarimanana, J. M. Rafahatelo, A.V. Ralison, T. Randriamananjara
By
Florence Bascom Geoscience Center

Bedrock, Borehole, and Water-Quality Characterization of a Methane-Producing Water Well in Wolfeboro, New Hampshire Bedrock, Borehole, and Water-Quality Characterization of a Methane-Producing Water Well in Wolfeboro, New Hampshire

In August 2004, a commercial drill rig was destroyed by ignition of an explosive gas released during the drilling of a domestic well in granitic bedrock in Tyngsborough, MA. This accident prompted the Massachusetts Department of Environmental Protection (MassDEP) to sample the well water for dissolved methane - a possible explosive fuel. Water samples collected from the Tyngsborough...
Authors
James R. Degnan, Gregory J. Walsh, Sarah M. Flanagan, Robert A. Burruss
By
New England Water Science Center

Borehole Characterization of a Methane-Yielding Bedrock Well, Tyngsborough, Massachusetts Borehole Characterization of a Methane-Yielding Bedrock Well, Tyngsborough, Massachusetts

In August 2004, a domestic water well was drilled into granitoid metamorphic rocks 5.38 kilometers southwest of Tyngsborough, Massachusetts, on Scribner Hill. According to well driller Roger Skillings of Skillings and Sons, Inc. (oral commun., 2005), no water was encountered during drilling and when the borehole reached a depth of approximately 305.1 m, a blue flame exploded out of the...
Authors
Herbert A. Pierce, Gregory J. Walsh, Robert A. Burruss, James R. Degnan

Integrated multi‐scale characterization of ground‐water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire Integrated multi‐scale characterization of ground‐water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire

This chapter contains sections titled: Introduction Mirror Lake Site Fractures and Geologic Mapping Hydraulic Properties of Fractured Rock From Meters to Kilometers Chemical Migration in Fractured Rock Fracture Controls on Ground‐Water Flow and Chemical Transport at the Mirror Lake Site Summary
Authors
Allen M. Shapiro, Paul A. Hsieh, William C. Burton, Gregory J. Walsh
By
Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, Florence Bascom Geoscience Center

*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

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