Bivalves
The class of Bivalves belongs to the phylum of Mollusca. The shells have two asymmetrical valves. The two valves are each others reflection (left and right valve).
Some bivalves consisted of aragonite, which does not fossilize very well. Often only the imprint is preserved. Other bivalves consisting of calcite mostly are well preserved. Bivalves are very common fossils.
Example of a bivalve. The shell itself is not symmetrical.
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 Go to the Photo page to view photographs of Bivalves. |
