jnicholes Posted June 3, 2020 Share Posted June 3, 2020 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. Link to comment Share on other sites More sharing options...
jnicholes Posted June 3, 2020 Author Share Posted June 3, 2020 Here is the fossil gastropod. Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 3, 2020 Share Posted June 3, 2020 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 VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
jnicholes Posted June 3, 2020 Author Share Posted June 3, 2020 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. 1 Link to comment Share on other sites More sharing options...
EscarpmentMary Posted June 4, 2020 Share Posted June 4, 2020 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. Link to comment Share on other sites More sharing options...
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