Geologist

M.A. Geology, Washington University, Saint Louis
B.A. Geology, University California, Berkeley

Berkeley Geochronology Lab (1982-1984)

Laboratory Assistant

Apennine Mountains, Italy (1988)

Field Geologist for Masters candidate Vicki Langenheim and Professor Walter Alvarez of U.C. Berkeley

Mexican Altiplano, San Luis Potosi, Mexico (1989)

Washington University graduate student researching for my Master's degree under Professor James Luhr and Jorge Aranda-Gomez.

Master's Thesis (1990)

Pool, G.B., 1990, "Petrology, Geochemistry and Geochronology of Lower-Crustal Xenoliths, Central Mexico," unpublished MA thesis, Washington University, Saint Louis, 109 p.

Abstract: Lower-crustal xenoliths from Quaternary-age volcanic vents in central Mexico have diverse lithologies. Their petrographic and geochemical characteristics are similar to other xenotlihs collected in Mexico and a similarity in lithology probably exists over a large portion of the Mexican lower crust. Meta-igneous granulites range widely in composition and may have been formed in an arc-setting as cumulates or liquids, since most retain trace element concentrations that are similar to those found in typical arc-related rocks. Meta-sedimentary granulites are similar to depleted shales and may represent either the basement that existed before arc volcanism created the meta-igneous granulites, or alternatively, sediments that were obducted from a subducting slab. U-Pb zircon geochronology suggests that the protoliths from metaigneous xenoliths either formed from subduction-related magmas in Paleozoic to Precambrian time, or alternatively, formed in the mid-Tertiary from Sierra Madre Occidental magmas that assimilated older, zircon-bearing crust.

Advisors: Dr. James F. Luhr, now at the Global Volcanism Network, Smithsonian Institute; Dr. Samuel P. Bowring, now at the Massachusetts Institute of Technology

Mexican Volcanic Belt, Guadalajara, Mexico (1990)

Field Geologist for Ph.D. candidate Paul Wallace and Professor Ian Carmichael of U.C. Berkeley

Hawaiian Volcano Observatory, Kilauea, Hawaii (1990-1992)

Research Associate - helped build a bibliographic database of Hawaiian geoscience with Dr. Thomas L. Wright and Jane Takahashi.

Volunteer Field Geologist - assisted HVO staff in regular observations of the volcano's activity, including visits to current eruption sites.