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the elder gods
(mander.xyz)
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.
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This is a science community. We use the Dawkins definition of meme.
There are different types of fossils, some of which apply to soft tissue:
Impression: A shallow imprint of a fossil organism that does not retain any organic material.
Compression: A fossil that has been crushed or flattened but retains some organic material, although it has been chemically altered.
Carbonization: A process that occurs during fossilization in which complex organic molecules are converted into a more stable carbon compound that generally has a dark brown color.
This appears to be an impression fossil.
I'll add that the entire organism can fossilize in an anoxic environment with rapid burial.