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Owen A. Callahan, Ph.D.
Registered: 20 Aug 2023 21:26
Last post: 3 Mar 2026 15:02
Structural and geothermal geologist. Water/rock interaction, faults & fractures, deformation, mineralization, hot springs. UAS, GIS. Owner, En Échelon Geosolutions (www.eegeos.com). He/Him.
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