Pat Leahy 1947 - 2026

Dr. P. Patrick Leahy passed August 7, 2026. Pat attended Boston College and received his doctorate in geology (1979) from Rensselaer Polytechnic Institute, in regional groundwater studies. He joined USGS in 1974, where he eventually served as Associate Director for Geology and Acting Director of USGS, before becoming AGI Executive Director from 2007-2016. He was accomplished and respected, he contributed broadly, he was a friend of AASG, and he will be missed.

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