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Seed and Coprolite?


PetrifiedDoubleGulp

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Yesterday I looked in my batch of unattended rocks and found one very mixed fossiliferous rock I had been meaning to explore.

These are two of the specimens I found inside:

 

 

 

dungandseed.jpg

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A few different views might help determine what these are. 
The small one looks a bit like a bivalve, but the other one I've got nothing. :headscratch:

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    Tim    -  VETERAN SHALE SPLITTER

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let me perfunctorily chime in with the above: i don't see the characteristic morphology of coprolites as known thus far to all known experts.

 

 

 

 

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Knowing the age of the rocks would be a great help for identifying specimens like these.

 

Here's a picture of a fossil seed surrounded by other plant parts (I previously thought of as an arachnid) from a Triphyllopteris seed fern from the lower Mississippian for comparison: 

 

arachnid 1.jpg

There are some similarities with your second specimen, but something just seems off about it. Particularly the shape and striations which are more indicative of a bivalve to me. 

 

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This clump was from Shoal Creek which has some Pleistocene and Upper Cretaceous if Im reading my geological survey right.

Thanks!!

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If it is a seed / plant diaspore, and if it is late Cretaceous, one taxon that you might compare it to is Spinifructus antiquus.  I am not sure if it has been found outside of the Lance and Hell Creek Formations, but it does have longitudinal striations.  It has sort of a "pear shape".  Can't tell the original shape of yours due to condition and angle. Might be a related taxon. Just a thought.

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No mystery here.  :)  These are both bivalve fossils (very common in the local formations).  The larger of the two looks like it has been worked over with a dremel or other aggressive prep tool.  :mellow:

The human mind has the ability to believe anything is true.  -  JJ

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I agree, both bivalves.

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In memory of Doren

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I'm with JohnJ on these. :)

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Thomas Mann

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