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Ethologist

Modern Or Fossil? What Is It?

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Ethologist

This question may make me seem dumb, but I can't figure it out and I feel especially slow tonight....

I just got back from a trip to Brownie's Beach/Bayfront Park Maryland, in the Calvert Cliffs Region and I found this bone/fossil.

Can anyone tell if it is modern or a fossil? What do you think it is from? I have a guess, but would like to hear what others think first, without biasing them.

Photos:

http://www.flickr.co.../in/photostream

http://www.flickr.co.../in/photostream

http://www.flickr.co.../in/photostream

http://www.flickr.co.../in/photostream

http://www.flickr.co.../in/photostream

Thanks in advance, to you fossil experts out there!

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Rockwood

Tap it gently with something hard. If it sounds like fine china it's mineralized and usually is a fossil. There are bones found there from a variety of time periods though and the distinction between fossil and just very old isn't always clear.

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Ethologist

I have been tapping it, but can't quite seem to decide. Although I am leaning towards fossilized, as it sounds very similar to how a fossil sounds. I will keep tapping it once it dries out. And I will try and get out a known fossilized bone and a known modern bone and try a comparison tap between the three.

Does anyone have any ideas on what kind of organism it came from and what specific bone it is?

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Auspex

My guess, based on the fact that it once had a core of cancellous (spongiform) bone, is that it is from a land mammal (vs marine); as such, the odds favor that it is Pleistocene or later.

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Rockwood

Second on those odds. I suspect it will get lighter as it dries out. Even early colonial is still pretty neat though.

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