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Comparing fossils


jnicholes

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I decided to do a little experiment. awhile ago, I went to the canyon in the Snake River, and I found a bunch of gastropod shells. Not extinct, these were not fossilized. I decided to bring some home and compare them to a fossil gastropod shell that I had.

 

I am aware that differences and similarities vary by species, but I don't know gastropod species that well, extinct or not.

 

Pictures are attached under a magnifier.  The white one is the living, the brown one is the extinct fossil.

 

 Due to file size, I'm posting the fossil on a different post.

 

I want to invite others to point out what they notice is different and similar about the living and extinct gastropods. (Besides the obvious fossil/non-fossil)

I'll point out what I notice myself later.

 

 

Screenshot_20200603-082724.png

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I see growth lines on the Modern gastropod. 

The fossil looks like an internal mold, so would probably not show that detail. 

The both seem to have 3 whorls, I think. 

They both grew in a counter-clockwise orientation.  

    Tim    -  VETERAN SHALE SPLITTER

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I agree. It's very interesting to compare modern to Fossil. It kind of gives you an idea of how they evolved.

 

Not trying to be rude, but I kind of disagree. It looks like a fossil shell. It even has some filling Inside it. It's also very smooth and shiny, which I don't think a mold would do.

 

Then again, I still am learning about fossils.

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I have had the same thoughts, it seems to me even in millions of years of evolution if the blue print is successful it is used again. 

FC7E8855-8DDC-47E0-8929-9D3E207D2713.jpeg

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