USGS Stable Isotope Facility Personnel

source Dr. Craig Johnson – Research Geologist (group leader)

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go to site Craig studies ore genesis, environmental impacts of mining, the source and fate of solutes in natural waters and crustal fluids, the isotopic record of marine sulfate, and isotopic records of paleoenvironments.




here Dr. Craig Stricker – Research Biologist Cayce Gulbransen – Geologist Rick Moscati – Geologist


source url Matt Emmons – Student Physical Scientist

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Front Range Isotope Group