An Illustrated and Cross-Referenced Glossary of
Malacological and Conchological Terms

by Paul S. Mikkelsen

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Term Definition

CAST   The mould from a FOSSIL shell, composed of matter which entered the shell in a soft state and has subsequently hardened, the shell eroded away, and the hardened material left to represent the internal form of the shell. See also ENDOCAST.

ENDOCAST   A FOSSIL formation created by material entering the interior of a shell hardening; the exterior shell material then degrades and dissolves away with the outside of the CAST taking on the interior shape of the shell; = STEINKERN.


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