Contact: Iqbal Pittalwala
University of California - Riverside
Caption: This photo shows researchers doing field sampling of a pyrite-rich black shale outcrop in China. The weathering of such sediments, which contain sulfur originally buried from the ocean, transfers sulfur isotope signals to the ocean to be buried again in marine sediments.
Credit: Chu Research Group, Institute of Geology and Geophysics, Chinese Academy of Sciences.
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