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Showing results for tags 'encrustation'.
Found 3 results
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Two factors were at work here. 1) This is just about the most complete specimen of Isorthoceras sociale that I've ever found. 2) I've been doing some research on contemporary squid chromatophores and photophores. So, I was pre-disposed to think I'd discovered some remarkable soft tissue preservation and was all set to announce the evidence of chromatophores in the Ordovician. And then I learned about bryozoan encrustation. Still pretty cool, though.
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This has always bugged me. This is a dinosaur rib (presumably triceratops) from the Lance Creek formation of Wyoming. The surface is encrusted with irregular nodules and crepe paper texture. I'm wondering if it could be fossilized desiccated connective tissue. Has anyone encountered something similar?
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I lost track of a recent thread, on Facebook I believe, comparing bioimmuration to a xenomorph. The consensus seemed to be that the common example of the impression of an ammonite on an oyster growing against it would be a xenomorph whereas bioimmuration would be more like the impression of something like a crinoid stem on an encrusting bryozoan which would typically be covered up, but we know it’s there. The distinction seems a little vague. Is there more to it than that?
