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

// added July 17, 2009 // 0 comments //

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

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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