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gem fossil

by robert mowery
(klamath fall or)

found out of a iron sandstone concerstion out of colorado the soft bodie parts are replace by minaral i belive it pirite and siderite my studieds lead me to believe they are rare i belive i read 1 out of two million concriction willl contain these kind of fossils with soft bodie replacement

Comments for gem fossil

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by: robert

thanks for the insieght on this hwo would one go with finding out about compisition and agian thanks for posting my gem fossil

by: Doug

I am not sure what you mean by soft body parts but I am 95% certain that your fossil is a bacculite.

Bacculites are related to ammonites but with long straight sections. The fossilized part is the shell. The feathery lines are called septa and mark where the animal has moved up into a larger new section walling off the old section of the shell.

Bacculites were plentiful during the Cretaceous Period.

I am curious about where in Colorado you found this.

Thanks for your submission.

More about ammonites here:

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