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Owen A. Callahan, Ph.D.

Owen A. Callahan, Ph.D.

Structural and geothermal geologist. Water/rock interaction, faults & fractures, deformation, mineralization, hot springs. UAS, GIS. Owner, En Échelon Geosolutions (www.eegeos.com). Associate faculty at Cabrillo College, Santa Cruz, CA. He/Him.

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