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Part of Maclurites or second fossil included in mold


tombk

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Hi all. I posted about a week ago in this forum with what I thought was a Maclurites fossil I found in the Galena Group in Illinois: http://www.thefossilforum.com/index.php?/topic/116602-ordovician-maclurites/. Others agreed with me. There are two parts of this fossil that I wonder about. One is fairly large and may be a piece where the outer shell of the Maclurites broke to reveal an inner layer. It may also be a second specimen that was fossilized along with the Maclurites, replacing part of it. (I bet there's a term for that, but I don't know it!) This part of the specimen stands out by virtue of being browner than the rest of the specimen. The second part presents a similar question. There is either an inclusion of a small gastropod near what I think is called the aperture of the Maclurites, or the Maclurites is fractal in form. Can somebody weigh in on what these two parts might be?

 

I took pictures of the large part (broken outer shell vs. second fossil inclusion) from a number of different angles and distances and with some different lighting to try to help with identification. The final picture is the second, tiny gastropod vs. small, fractal portion, although you can see this in some of the other images also. (My money is on a second, tiny gastropod, although fractal structure would be way cooler!)

 

First angle

IMG_1.thumb.jpeg.e60393941cf53e12f513bd5b14372235.jpeg

 

A closer view at this same angle

IMG_2.thumb.jpeg.8825de901479e399fb779adf0c3f47ab.jpeg

 

Closer view from the same angle but with different lighting

IMG_3.thumb.jpeg.8709eff79af0aa9ac17a7c944a238daf.jpeg

 

A view from a second perspective

IMG_4.thumb.jpeg.3ef10a088869cacd20e0203ef873db82.jpeg

 

And closer up with this second perspective

IMG_5.thumb.jpeg.7a143adfa7f5268072fe7bf93681fad3.jpeg

 

A third perspective

IMG_6.thumb.jpeg.6a189a79a73b68b24b3bb59d0eef27ac.jpeg

 

Closer from third perspective

IMG_7.thumb.jpeg.af4410a05c5ef9da63a6c25fac8cf26b.jpeg

 

And a bit closer from third perspective and with different lighting

IMG_8.thumb.jpeg.004ed54999f8c484aee90d7199d8c98a.jpeg

 

A fourth perspective

IMG_9.thumb.jpeg.8673416cb9f2b4e94c5f4ee641110482.jpeg

 

Closer view from fourth perspective

IMG_10.thumb.jpeg.e188417c60672b2283255789dd86ab9b.jpeg

 

A fifth and final perspective

IMG_11.thumb.jpeg.0e41976a6cfc8a0d121f5e7a691307aa.jpeg

 

And closer from fifth perspective

IMG_12.thumb.jpeg.b705b6df46eb363886ffdd1432886e2c.jpeg

 

And even closer from fifth perspective

IMG_13.thumb.jpeg.79006d38e9aaf54278e4c483dd6300e3.jpeg

 

Finally, the small gastropod or fractal portion

1231229318_smallsnail.thumb.jpeg.d14d311ce772437fe5b7b40fd392f396.jpeg

 

Thanks for your help! :tiphat:

 

 

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Looks like part of something else, perhaps another Maclurites, like the smaller one.

I think only some careful preparation may show what it is.
And even then, perhaps not.  :shrug:

  • Thank You 1

    Tim    -  VETERAN SHALE SPLITTER

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