rockingthenorth
fully equipped rock polisher
Member since January 2012
Posts: 1,637
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Post by rockingthenorth on Sept 24, 2012 17:21:32 GMT -5
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keystonecops
freely admits to licking rocks
Member since October 2010
Posts: 957
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Post by keystonecops on Sept 24, 2012 18:50:42 GMT -5
The one with alla eyes oughta make some good cabs. Later Clyde
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herchenx
Cave Dweller
Member since January 2012
Posts: 3,360
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Post by herchenx on Sept 24, 2012 19:47:52 GMT -5
I wonder if the last one you showed is coral?
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rockingthenorth
fully equipped rock polisher
Member since January 2012
Posts: 1,637
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Post by rockingthenorth on Sept 24, 2012 20:08:26 GMT -5
the last rock I could prolly cut it in half and make two cabs. not sure what it is
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Post by talkingstones on Sept 24, 2012 20:56:16 GMT -5
Tammy, looks like you had some serious fun there! Great pieces and that is most definitely a really arrowhead! Enjoy!!!
Cathy
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Minnesota Daniel
freely admits to licking rocks
A COUPLE LAKERS
Member since August 2011
Posts: 891
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Post by Minnesota Daniel on Sept 24, 2012 21:36:31 GMT -5
The one you call banded flint I think is more likely stromatolite.
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jspencer
freely admits to licking rocks
Member since March 2011
Posts: 929
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Post by jspencer on Sept 25, 2012 23:27:57 GMT -5
The one with all the eyes really looks like a flint rock full of a tiny armored boring sponge that would attach itself to coral and crustaceans during the cretaceous period. I would have posted a pic here but the option is not available. I have a pic of one of these small creatures on a flint nodule I will post on fossil forum. Each one has armored plates covering it much like an urchin.
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Post by Hard Rock Cafe on Sept 26, 2012 11:46:01 GMT -5
Sandstone balls are concretions.
Fun finds!
Chuck
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rockingthenorth
fully equipped rock polisher
Member since January 2012
Posts: 1,637
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Post by rockingthenorth on Sept 27, 2012 11:08:51 GMT -5
@ daniel What is stomatolite. and jspencer what kind of boring sponge is there a name for it. @ hardrockcafe I knew that but but have a problem with ICRS.
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Minnesota Daniel
freely admits to licking rocks
A COUPLE LAKERS
Member since August 2011
Posts: 891
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Post by Minnesota Daniel on Sept 27, 2012 19:00:20 GMT -5
Tammy,
Google stromatolite for images. It's a type of very old rock formed by colonies of cyanobacteria. When it becomes silicified it can look almost like fortification agate, but not quite the same. It typically has some very distinct, deep swirls in the banding, kinda looking like the shape of Florida. It often has vugs too, and the bands aren't necessarily all the same hardness, so they often don't erode evenly either. The colors and banding are similar in pattern, but all the banded flint I've ever seen was pretty smooth. Other people, like Mel, have seen a lot more flint than I, so maybe they have a better idea what it is.
Daniel
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