John W. Valley

The Apex Chert is a flint-like rock from Western Australia, which contains some of the oldest known fossils. The microscopic fossils are single-celled [[bacteria John Williams Valley (born February 28, 1948, in Winchester, Massachusetts) is an American geochemist and petrologist. He is an expert on stable isotope geochemistry, especially as applied to understanding the evolution of the Earth's crust. Provided by Wikipedia
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    Oxygen Isotope Variability within Nautilus Shell Growth Bands.
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    Oxygen isotopes internal equilibrium in magmatic epidote-bearing granitoids
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    Zircon Xenocrysts from Cenozoic Alkaline Basalts of the Ratanakiri Volcanic Province (Cambodia), Southeast Asia—Trace Element Geochemistry, O-Hf Isotopic Composition, U-Pb and (U-Th)/He Geochronology—Revelations into the Underlying Lithospheric Mantle
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    Of travertine and time: otolith chemistry and microstructure detect provenance and demography of endangered humpback chub in Grand Canyon, USA.
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