USGS Stable Isotope Facility Personnel Dr. Craig Johnson – Research Geologist (group leader)

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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.

 Dr. Craig Stricker – Research Biologist


source url Cayce Gulbransen – Geologist


source Rick Moscati – Geologist


viagra tablets us Matt Emmons – Student Physical Scientist

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Front Range Isotope Group