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Stingray mouthplate, shell or something else?


PSchleis

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Picked up on Myrtle Beach today. I've seen stingray mouth plates before and this reminds me of that, but they were always small detached pieces with the vertical lines - never inside something bigger. So maybe this is something else? A piece of shell maybe? Appreciate your thoughts.

Thanks!

Paula

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In your second photo it appears to be thin so I would say shell.

 

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Paula, I think you have bivalve imprints in a phosphatic matrix.

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I would say either a broken worn pecten cemented to the matrix or a pecten imprint in the matrix.

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image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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1 hour ago, sixgill pete said:

I would say either a broken worn pecten cemented to the matrix or a pecten imprint in the matrix.

Good point, but I've never seen that kind of ornaments in any (lower or upper) internal sides of the Miocene - onward pectinid valves I collected in Romania. I would mention, that all of them were hundreds miles away from any recent sea or ocean shore, so I can't imagine how they may look inhabited for a long time in a phosphate-rich saltwater environment.

" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

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3 hours ago, sixgill pete said:

I would say either a broken worn pecten cemented to the matrix or a pecten imprint in the matrix.

Yeah, I'm leaning more toward some kind of shell in the matrix (or imprinted) then something biological now. Thanks!

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