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Fiber web-like thing inside rock


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stacylaray

Found this rock in southern colorado. Strange, squares, seemingly fibers of some sort. 

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Edited by stacylaray
Include my hand for scale
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FranzBernhard

Is the stuff organic, how does it react when holding a small piece into a flame?
Franz Bernhard

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stacylaray

It is just as hard as the rest of the rock. Held a lighter to it and nothing happened except I turned that part a little darker. 

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stacylaray

I am able to rough the surface with my fingernail. It acts like wood. 

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Rockwood

Serpentine ?

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Mark Kmiecik

Looks like boxwork. Google it.

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FranzBernhard
38 minutes ago, stacylaray said:

I am able to rough the surface with my fingernail. It acts like wood. 

 

16 minutes ago, Rockwood said:

Serpentine ?

This seems to be the most plausible, judging from the available data.

A serpentine mineral or related mineral formed in cracks of a mineral, which later fell out or weathered out. Technically forming a boxwork structure.

Is such stuff known in southern Colorado? Serpentinites etc.?

Franz Bernhard

Edited by FranzBernhard
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