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Showing results for tags 'oak springs trilobite site'.
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I have been working through the trilobite specimens I dug recently at the Oak Springs Trilobite Site in eastern Nevada. I came across this feature in the shale that I can't identify. When I split the piece of shale I found this oval-shaped feature on both halves. It could be geologic or possibly some sort of fossil. It has the same reddish color as some of the trilobites I found, but it's clearly not a trilobite. When I turned one slab over I found the shape extended through the thickness of the slab (about 7 mm or 1/4 in thick) but was no longer a simple oval on the other side, it was much wider. It did not extend through the thickness of the other half of the slab. Anyone have any idea what this is? This is from the Combined Metals Member of the Pioche Shale. The Combined Metals Member was named by the mining community. Apparently this ore was fairly rich in silver, lead, and zinc sulfides and was mined heavily in the early part of the 20th century. Here is the shape from the inside of the split slab (looks the same on both halves). Scale in mm: And here is what it looks like on the other side of the slab:
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