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      The Oldest Shrimp (Devonian: Famennian) and Remarkable Preservation of Soft Tissue

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      Journal of Crustacean Biology
      Crustacean Society

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          The role of the calcium carbonate-calcium phosphate switch in the mineralization of soft-bodied fossils

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            Fossilization of soft tissue in the laboratory.

            Some of the most remarkable fossils preserve cellular details of soft tissues. In many of these, the tissues have been replaced by calcium phosphate. This process has been assumed to require elevated concentrations of phosphate in sediment pore waters. In decay experiments modern shrimps became partially mineralized in amorphous calcium phosphate, preserving cellular details of muscle tissue, particularly in a system closed to oxygen. The source for the formation of calcium phosphate was the shrimp itself. Mineralization, which was accompanied by a drop in pH, commenced within 2 weeks and increased in extent for at least 4 to 8 weeks. This mechanism halts the normal loss of detail of soft-tissue morphology before fossilization. Similar closed conditions would prevail where organisms are rapidly overgrown by microbial mats.
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              Decay and Mineralization of Shrimps

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                Author and article information

                Journal
                Journal of Crustacean Biology
                Crustacean Society
                0278-0372
                1937-240X
                November 01 2010
                November 01 2010
                : 30
                : 4
                : 629-635
                Article
                10.1651/09-3268.1
                4c9c4a3a-d751-4a81-bcea-0e4c36e029d4
                © 2010
                History

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