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big trace fossils?


fossils4fun

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This is a big boulder I happened on the other day that I thought was interesting, I guess it could be water erosion, just throwing that out there. Always interested to hear your thoughts.

Also the picture beside the hand is some sort of trace fossil, would love to know the name, thanks for any info you can give.

DSCF6348.JPG

DSCF6349.JPG

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6 minutes ago, fossils4fun said:

This is a big boulder I happened on the other day that I thought was interesting, I guess it could be water erosion, just throwing that out there. Always interested to hear your thoughts.

Also the picture beside the hand is some sort of trace fossil, would love to know the name, thanks for any info you can give.

DSCF6348.JPG

DSCF6349.JPG

 

The first one is a water erosion feature formed when water mixed with sediment swirls around in a rock and carves out a cavity.

 

 

 

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In the second photo, I see what appears to be a long-section of the bryozoan Archimedes (it's a bit blurry.  It could be a nautiloid or even a big crinoid long-section, I suppose, too) as well as some crinoid columnals.  Maybe a Mississippean Period deposit?

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I agree, ... this seems to be a cross section of an Archimedes bryozoan. 

Compare with this picture, from Pinterest. 

 

e8c4c2e778e1dab44a233bc8205e7a4b.jpg

 

 

More pictures HERE.

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Here is a couple more examples to add to the excellent photo that Fossildude19 provided:

Archimedes3small.thumb.jpg.42ec4411b1bf6c8f9429248d43a98f24.jpg

Archimedes4small.thumb.jpg.33c00b8d225e98e2ffb4c37c5242719a.jpg

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