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Stromatolite or Stromatoporoid or neither?


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Lone Hunter
Posted (edited)

Not sure what to make of this, came from mix of Cretaceous and QAL, breaks very easily. Thinking it's sedimentary but then wouldn't it be harder?  

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Edited by Lone Hunter
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Rockwood
4 minutes ago, Lone Hunter said:

Thinking it's sedimentary but then wouldn't it be harder? 

Yes, and no. :)

'fraid that's it.

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I am not an expert.

But doesn't look like a Stromatolite to me 

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Lone Hunter
Posted (edited)

My first gut feeling was a sedimentary structure, but I'm not 100% there.  I couldn't help but smack it since it had a perforation line, it fell apart easily and now I've got more questions.:)  Why aren't the different bands of color going in the same direction as the flow of the structure?  Pretty sure I see cross hatching, is that possible if it's sedimentary? Couple other interesting shots from a chip and inside.

 

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Edited by Lone Hunter
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Rockwood

Over my head. Perhaps iron oxide cementation is the best I can suggest. Cross bedding is relatively common in sandstone.

Runny stuff. Blows with the wind. :) 

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Lone Hunter

Lol I love your replies. Thank you for consistently helping me out. :)

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