USGS Radiogenic Isotope Facility Personnel Wayne Premo – Research Geologist

go to link bio image of Wayne  Premo Wayne’s research interests include secular marine chemical and isotopic changes, mineral deposit systems that formed in long-lived and reactivated continent-scale tectonic zones, temporal and tectonic evolution of crustal blocks within southern California and evolution of Proterozoic terranes of the central and southwestern United States.

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follow link go Leonid Neymark – Research Chemist

propecia uk bio image of Leonid  Neymark

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cialis generico 5 mg prezzo in farmacia Leonid’s area of expertise is isotope geochemistry and geochronology

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prescription drug patent expiration viagra commercial actress Jim Paces – Research Geologist

bio image of James  Paces

Jim is engaged in various studies of climate change, landscape evolution, paleoseismicity, paleontology, and water sources/flow processes using U-series- and Sr-isotope data obtained from opaline silica, tufa, travertine, speleothems, bone, paleosols, peat, and water.




source Kathleen Simmons – Geologist

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