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Let's think outside the box


Baddadcp

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Been looking at this and trying to decide how to approach it. Have at it. I can do close ups on the flats, but not the radius of the, dare I say, shell.

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I'll go with non-fossil geologic on this one. Interesting banding. Maybe @ynot could say something for what type of mineralization and deposition aspects account for the variation in colouring. The black crusty stuff might hold some fossil promise (possible carbonization from plant material?). Perhaps show us a close-up of that feature.

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Fossildude19

The carbonization on the edge of the semi-circle puts me in mind of something plant-ish. 

Not sure what else can be said here. 

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goatinformationist

The blackish could be hematite, manganese, maybe nickel mix or just rotten iron.

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Concretion around some wood that has since worn away methinks, unless the the Carbonized loom is some sort of crystal, can’t tell from the picture.

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Interesting and colorful geologic specimen.

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The black material looks to be something, but I have no idea as to what?  either way, for me, its not much.

 

RB

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@Baddadcp, where is this from?  It looks like a sandstone concretion formed around some carbonized wood.  But the only places I know that have those color sandstone are out west...and maybe midwest.  

This pic is from google images showing a sandstone concretion from Oregon.

 

Image result for concretion formed around wood

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4 hours ago, Walt said:

@Baddadcp, where is this from?  It looks like a sandstone concretion formed around some carbonized wood.  But the only places I know that have those color sandstone are out west...and maybe midwest.  

This pic is from google images showing a sandstone concretion from Oregon.

 

Image result for concretion formed around wood

 

4 hours ago, Walt said:

@Baddadcp, where is this from?  It looks like a sandstone concretion formed around some carbonized wood.  But the only places I know that have those color sandstone are out west...and maybe midwest.  

This pic is from google images showing a sandstone concretion from Oregon.

 

Image result for concretion formed around wood

Lower Cretaceous, Arundel or Patuxent formation. Here are some close ups of the black material.

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On 8/20/2018 at 4:49 PM, Kane said:

Maybe @ynot could say something

 

On 8/21/2018 at 1:50 PM, Walt said:

wait on @ynot

 

 

It is a mineral stained rock.

Without some test not much more can be said.

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On 8/21/2018 at 7:05 PM, Walt said:

This pic is from google images showing a sandstone concretion from Oregon.

 

Image result for concretion formed around wood

 

What nice Liesegang rings ...

 

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