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PrehistoricWonders

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Hey,

I was looking at this bone I found in Summerville, SC and I’m curious to know what the marks are, I know they’re probably not anything but I figured I’d ask so that I could just stop wondering! TIA!

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These are some pics, the bone is 2 3/8 inches long. TIA!

2C874DB6-AF12-4809-AC71-ECBE0AEAA7B8.jpeg

E7FAE0B1-D0BD-4F41-B75A-F926B34B78E9.jpeg

846098AD-9613-46B9-B52F-774C51315C89.jpeg

DAF604D6-BD09-40EE-9B4D-477E7AF5253C.jpeg

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Could be where a smaller shark dragged its teeth along the bone seeking a place to get a good mouthful of meat.  Or, it could be just scuffs from the substrate.  Hard to say.

  • I found this Informative 1

http://pristis.wix.com/the-demijohn-page

 

What seest thou else

In the dark backward and abysm of time?

---Shakespeare, The Tempest

 

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Yeah, that's a tough one. Could be predation or scavenger marks. Could also be just friction scars from mechanical tumbling action in the river or grinding during consolidation and deposition. They are faint and rather insubstantial, so it's hard to tell. The really good predation marks are the obvious ones - they jump out at you. I've seen deep scars on dugong ribs from megalodons that are very striking. The depth, angle, and spacing of marks is also a tell. Deep parallel grooves that are evenly spaced are an obvious example.

 

 

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