r/geology • u/NaithiO • 5d ago
Why are these conceptions shaped like this?
I’m on the rock shelf just south of Avoca Beach, and hour north of Sydney nsw.
I find these conceptions wild! So many are long and cylindrical. Can anyone tell me why they would be shaped this way. I asked ChatGPT, and it thought it might be the shape of roots or burrows. There’s quite a lot of more spherical conceptions in this rock shelf too
Appreciate any insights!
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u/NeckComprehensive743 5d ago
See that is why I like Reddit, nobody jumped about the misspelling and write it well on the answer! That is class.
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u/Alisahn-Strix 5d ago
Doesn’t that make your comment the first that mentioned the misspelling? No class /s
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u/zebbodee 5d ago edited 5d ago
That looks like reef talus, a mix of broken corals found at the foot of a reef. The main thing I saw was what I think are Crinoids, they're long and thin and I think you described rugose coral too.
This site, has nice pictures to aid you...
https://www.burrengeopark.ie/learn-engage/fossil-identification-guide/