Wierd rock/fossil? - Identification?

pauljc

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Wierd rock/fossil? - Identification?

Submitted by pauljc on Wed, 07/02/2008 - 21:06.

Found this the other night on the beach, only idea is possibly flint:

http://img112.imageshack.us/img112/4300/p2110689jy7.jpg

http://img359.imageshack.us/img359/1908/p2110695al9.jpg

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DuncanHill

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Could be flint - we get

Thu, 07/03/2008 - 00:17

Could be flint - we get similar pebbles round here (Brighton) - where was the beach you found it on? Also, do you feel like breaking a bit off so we can see what it is like inside?

pauljc

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Northumberland and I don't

Thu, 07/03/2008 - 11:05

Northumberland and I don't really feel like breaking it

Jon

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My guess is some form of

Thu, 07/03/2008 - 11:49

My guess is some form of re-mineralisation of calcite. Does it scratch with your nail (or about the same kind of hardness). Given it's from a beach in Northumberland, I'm guessing it's part of the carboniferous sequence there - lots of sandstone and limestone. It could even be the eroded remains of a bit of coral.

This is the problem with eroded pebbles! They could be anything!

Geologists are gneiss!!

pauljc

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I don't think its calcite

Thu, 07/03/2008 - 12:45

I don't think its calcite, I considered coral but im not 100% sure on that one

GeologyRocks