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Brachiopod mold fossil



Small, strongly ridged shell-looking fossils in a large rock.


Found in a large rock that is part of a retaining wall.

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Phil_S 9 years ago

This would actually be a cast of a brachiopod. A mold wold be an impression in the rock. A cast is when that mold is filled in. Excellent find!

Mark Ridgway
Mark Ridgway 10 years ago

These look like a type of clam...

Mark Ridgway
Mark Ridgway 10 years ago

They couldn't be shells if they are hundreds of millions of years old. The shell is replaced by something else. These types of creatures do still exist in some parts of the world. In PA.USA they will be fossils probably.

KarenSaxton 10 years ago

How do you know it's mold and not shells? I'm just curious because I used to see similar on the beach in San Diego

Leuba Ridgway
Leuba Ridgway 10 years ago

good find !

Spotted by

Pennsylvania, USA

Spotted on Oct 23, 2011
Submitted on Oct 24, 2011

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