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News Release 11-250
Ancient Environment Led to Earth's Current Marine Biodiversity
Changes in global carbon, sulfur cycles and to sea-level fueled biological responses
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Fossil snails known as turritellid gastropods; they're about 13 million years old.
Credit: Shanan Peters
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Sedimentary rocks in the Grand Canyon, Arizona; they reflect patterns of long-ago seas.
Credit: Shanan Peters
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Horn corals about 450 million years old; they're often found in the fossil record.
Credit: Shanan Peters
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Rocks in present-day Montana record the comings and goings of former shallow seas.
Credit: Shanan Peters
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A succession of sedimentary rocks from ancient shallow seas, exposed now in Montana.
Credit: Shanan Peters
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The researchers' work is described in the November 25, 2011 issue of the journal Science.
Credit: Copyright AAAS 2011
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