Green | July 17, 2009 | 0 comments

Ancient Microorganisms Helped Build 3.4-billion-year-old Stromatolite Rock Structures

source: http://www.sciencedaily.com/releases/2009/07/090716141221.htm

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Stromatolites are dome- or column-like sedimentary rock structures that are formed in shallow water, layer by layer, over long periods of geologic time.
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    Earth and Science,  Science,  microorganism
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