Molds and Casts.
05/07/2014, 12:10 am
Filed under: ART, Books | Tags: , , , , , ,

Not all fossils are bones, some are mere indications of life…

dissolved away so that only a cavity remains–the walls of which are a natural mold.

Substances may fill the cavity, forming a natural cast of the original.

Such casts are common.

Foot-prints or trails of animals harden as a mold.

Filled with fresh mud,casts are formed and both may be preserved.

Screen shot 2014-05-06 at 8.04.13 PM

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