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PeeDee belemnite |
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PeeDee belemnite [‚pē‚dē bə′lem‚nīt]
(geochemistry) Limestone from the PeeDee Formation in South Carolina (derived from the Cretaceous marine fossilBelemnitella americana), the carbon and oxygen isotope ratios of which are used as an international reference standard. Abbreviated PDB. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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