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Fossil Collector Archive Message | |
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Brachiopod
Posted by R.S. on December 27, 1997 at 00:50:43: I found this little shell (about 9mm from apex to rim) lying among the fragments of shale at the southern site in the Marble Mountains. It is apparently an extinct brachiopod, Mickwitzia occidens, Walcott (1900), according to Virtual Guide. I have noticed that brachiopods occur regularly along with the trilobites in the shale. In this specimen, a trilobite cephalon can be seen beneath and through the shell. Was the shell CaCO3 like modern shells? Or CaPO4? Some of the original shell remains. Perhaps this can be analyzed later. At any rate, I has been 560 my since this specimen has seen the light of day. R.S. |