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Post by beefjello on Jan 21, 2009 19:13:29 GMT -5
I picked this up in a small estate sale last summer that was predominantly Arizona material. It has a high iron content (or so it appears), but has an organic look to it. I call it the petrified corn cob Back side has a couple broken 'kernels' Side Any thoughts on what this might be?
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Saskrock
fully equipped rock polisher
Member since October 2007
Posts: 1,852
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Post by Saskrock on Jan 21, 2009 19:26:15 GMT -5
Kind of looks like a bit of branch with bark. Thats my guess anyhow
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Post by akansan on Jan 21, 2009 19:31:06 GMT -5
Is it a concretion?
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SteveHolmes
fully equipped rock polisher
Member since July 2009
Posts: 1,900
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Post by SteveHolmes on Jan 21, 2009 19:34:28 GMT -5
Pnecone, Stromatolite??....MEL? ? You gonna cut it and polish an end Beef?? Steve
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,487
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Post by Sabre52 on Jan 21, 2009 20:19:11 GMT -5
That is so cool. I suspect it's stromatolite built up around a twig. Would have to see the cross section to know for sure.....Mel
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lapidopterix
starting to spend too much on rocks
Member since March 2008
Posts: 216
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Post by lapidopterix on Jan 21, 2009 22:08:08 GMT -5
It looks like an iron siderite concretion. I have some from Salmon Creek, WA that look very similar. They wash out of the ground all spiky and get worn in the creek until they look like turds. Yours looks about halfway between spiky and turd.
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Tigger
freely admits to licking rocks
The Wonderful Thing About Tiggers is I'm the Only One!
Member since January 2008
Posts: 896
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Post by Tigger on Jan 22, 2009 2:25:14 GMT -5
You got one of them there ancient corn rocks! LOL It does look like pet cob of corn. Very cool find.
Tigger
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free4rms
freely admits to licking rocks
My little pet walrus
Member since January 2007
Posts: 839
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Post by free4rms on Jan 22, 2009 8:40:16 GMT -5
If this was from my area (S.C.) I would say that it is a fossilized cast of a marine burrow. Shrimp and other crustaceans secret some kind of fluid that solidifies the walls of their burrows so that they do not cave in. Later, the burrows do fill in with sediment and when they fossilize as cast fossils, this is what they look like.
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Post by beefjello on Jan 22, 2009 19:52:05 GMT -5
Thanks all for the ideas! So.. it might be a branch, a concretion, a pine cone, a stromatolite, a marine burrow or a spiky 'turd' thing LOL! I'll just call it my pet corn cob
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