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Amphibian Leg Bone Fossil

A boy from LaMoille found this fossil in a quarry near LaSalle.

The fossil is a Pennsylvanian amphibian leg bone, which appears to be preserved with chert.  The matrix rock is a limey mud (kind of odd for a freshwater animal).  Speculation: the poor critter may have been washed into the wrong environment and died as a result.

Close examination shows some very nice striatons along the bone.

Four pictures from slightly different angles.

amphb002.jpg (74004 bytes)

amphb003.jpg (74328 bytes)

amphb004.jpg (75160 bytes)

amphb005.jpg (76468 bytes)

 

 

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last updated: 06/01/06