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cngodles

Carboniferous Limestone

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cngodles

This piece of limestone looked like sea shells (clams or brachiopods) at first glance. However it’s one bumpy continuous surface. Any idea? The rock would be around 305 million years old. The rock broke easily along this surface which made it easy to see. Shells typically show white preserved Agagonite on them as well. No such preservation on this surface.

 

Rock from Western Pennsylvania, United States. The surface is wet.

 

Ruler is in inches.

6AD987D8-B8F3-4499-919D-6961A004D95E.jpeg

070FDD30-1C96-4A85-9AFE-3554A339E732.jpeg

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cngodles

Possibly Zoophycus?

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Fossildude19

This looks to me like a jumbled mass of Calamites  bits. 

They were a type of arborescent horsetail. 

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cngodles

It’s woody, that’s for sure. I looked at it closely in the microscope and there is a thin layer of what is or looks like coal with white veins. I’m starting to believe this is a mass of land plants that got buried at sea.

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cngodles

Microscope detail showing coal or carbon rich material with white veins. They look like roots, but at close inspection they fill the fissures in the rock.

57C54E2B-9769-4B7D-8EF2-1DB77658B26F.jpeg

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Rockwood

Cordiates leaves is another possibility that would explain the absence of transverse features.

The white veins look like conducting tissue (leaf traces) in lycopod cortex/periderm. 

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Fossildude19
11 hours ago, cngodles said:

It’s woody, that’s for sure. I looked at it closely in the microscope and there is a thin layer of what is or looks like coal with white veins. I’m starting to believe this is a mass of land plants that got buried at sea.

That would explain it's presence in limestone, and possibly the lack of detail.  :) 

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Coco

Please put your pics directly on the forum !

 

Coco

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