pilot789 Posted September 5, 2016 Share Posted September 5, 2016 About 3"X2"X1.25" Found in a friend's yard, a friend who collects fossils. He doesn't remember where he got it. But it is most likely from the Miocene Greeensands of the Gay Head Cliffs, and represents some bone of a marine mammal. The end is extremely smooth and shiny, looks a lot like a bone. It is a heavy chunk of rock. A seal bone? Small whale? This 1934 study is the best reference that I've found for the 100-million year old geology of the Gay Head Cliffs where bones of a camel and a horse were found in a glacial era deposit, and many marine fossils have been found in the greensands. https://archive.org/stream/mobot31753003559371/mobot31753003559371_djvu.txt Link to comment Share on other sites More sharing options...
fifbrindacier Posted September 6, 2016 Share Posted September 6, 2016 It seems geologic to me, but the aspect of that inner shape looks different from the other parts of the piece, so wait for more knowledgeable's opinion. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Jdeutsch Posted September 6, 2016 Share Posted September 6, 2016 Might be slag https://www.google.com/search?q=black+slag+rock&espv=2&biw=1292&bih=609&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjkm6KP0fnOAhVJ6mMKHdFHBLgQ_AUIBigB Link to comment Share on other sites More sharing options...
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