Question Details	Asked By	Asked On
Cambrian Explosion	nafee9	04/15/06
Why are brachiopods generally better preserved than bivalves? What are the exceptations to this statement and why ?
Answered By		Answered On
rsalier		04/16/06
At the time bivalves where just in the process of evolving and had not yet developed the strong shell structures of the brachiopoda. That is why there are thick deposits of brachiopoda. While the thinner shells of the bivalves were crushed in many of these same sediments. As the bivalves evolved with thicker shells, they became more abundant and soon replaces the sholes of brachiopods since the bivalves are mobile and were able to move with food resources where the brachipods could not.

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