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Strange patterns


Malone

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I don't think those are fossils at all. 

They look like some sort of mineral growth/precipitation/inclusion. :unsure: 

Maybe @ynot will have some thoughts. 

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3 minutes ago, Fossildude19 said:

I don't think those are fossils at all. 

They look like some sort of mineral growth/precipitation/inclusion. :unsure: 

Maybe @ynot will have some thoughts. 

Thanks for your thoughts!

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2 hours ago, ynot said:

Small crystals (probably calcit) that formed in a crack between rocks.

Thanks I kinda thought that too but I had never seen them form so sporadically and the oxide combined.

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33 minutes ago, Malone said:

Thanks I kinda thought that too but I had never seen them form so sporadically and the oxide combined.

I agree with ynot's suspicion. This type of occurrence is relatively common in thin cracks and crevices. It shows that mineral deposits start with small crystals which then grow and/or multiply until the crack is filled unless some mechanism stops the growth, and then you are left with a group like you have found.

 

Greetings from the Lake of Constance. Roger

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The texture would be called myrmekitic,if the rock were metamorphic.

 

Beneath :texture from a Sri Lankan carbonatite complex

 

 

 

 

mtrrasurtornyy.jpg

 

 

 

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On 2/8/2018 at 11:04 PM, doushantuo said:

The texture would be called myrmekitic,if the rock were metamorphic.

 

Beneath :texture from a Sri Lankan carbonatite complex

 

 

 

 

mtrrasurtornyy.jpg

Right on!

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