Re: [Geology2] very interesting mystery rock

The picture is really cool of the crinoids but they look like groups of testicles.. the other picture has longer ..forms. This is just an unprofessional opinion. Allison

From: ChuckB <gumboyaya@cox.net>
To: geology2@yahoogroups.com
Sent: Thursday, August 9, 2012 8:41 AM
Subject: Re: [Geology2] very interesting mystery rock

 

Lin,

You wrote:

 

My vote is that it's a fossil, given the pattern of segmentation, and it reminded me of one particular type of fossil invert. I finally found the name of it, too. Here it is:

http://www.fossilmuseum.net/fossils/Crinoids/Uintacrinus-socialis/Uintacrinus.htm

Note that with crinoid stems, the segments are more uniform in size and only vary gradually along the length. In the mystery rock, they are quite irregular. That makes my vote for it being a pseudofossil.

Chuck

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