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Some Pennsylvanian Gastropods


Missourian

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Very nice specimens! Maybe you can get the local hospital to x-ray the snail with the operculum, maybe it's still in there ^_^

I'm afraid it's escargone. :)

Context is critical.

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I'm afraid it's escargone. :)

GROAN....

"There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant

“Try to learn something about everything and everything about something.” - Thomas Henry Huxley

>Paleontology is an evolving science.

>May your wonders never cease!

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  • 5 months later...

Update....

 

Some of the gastropods under the microscope:

 

post-6808-0-51028700-1358075651_thumb.jpg

 

The gastropod with the operculum is about 4 mm across. The detail is extraordinarily exquisite for mollusks found in the area. The sinuous white things, which I thought could be bryozoa, may actually be silica-filled root molds. These roots are readily visible on any rock face near the mid-Winterset erosional surface.

 

An honorable mention should go to various microfossils found in the mix:

 

post-6808-0-63183700-1358075646_thumb.jpg

 

They include ostracods (white bean-shaped objects), arenaceous forams (orange swirly things), and a myriad of tiny 'needles' that may be sponge spicules. I believe the largest ostracod is about 0.5 mm long.

Context is critical.

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Those gastropods are exquisite! I might have to try my hand at dissolving some rock soon...

I like crinoids......

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