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JamesAndTheFossilPeach

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This really cool trilobite came out of the wanakah shale of the Hamilton formation.

F2F711F9-286D-4BA3-83C8-BD01ADF07D5F.jpeg

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Is the coloring just minerals in the trilobite or is it something else. If anyone can tell me that would be cool. Me and Jay have a couple ideas about what it’s is but we’re not sure 

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Very nice. It is still Eldredgeops rana. They can appear slightly different, even within the same formation, on account of deposition and taphonomic processes. I have encountered them in various colours/shades from black, chocolate brown, tan, to grey. 

...How to Philosophize with a Hammer

 

 

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13 minutes ago, DevonianDigger said:

To be clear, my ideas never involved it being a different species, lol.

What? When did I say that 

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To clarify I mean what causes the change in color not the species 

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I wonder if this could reflect a recently molted trilobite with an exoskeleton that is not completely sclerotized, versus an older individual.

 

Alternatively, maybe the light colored one was closer to the surface, or more exposed to groundwater movement that leached the mineral content some.

 

Don

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