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Randyw

Ummm what is it?

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Randyw

Hi.

i recently purchased the “little pile of stuff” in the for sale section. And as I was looking over the slab I’m finding “heads” off of 5 trilobites (you can see one on upper right corner of the picture) and I’m getting more and more excited when I notice a discoloration on the side. So I carefully split it there. At first I’m thinking “oh cool! A leaf!” But as I’m looking at it I notice the strange structures right at the edge..now I’m not so sure anymore. What the heck did I luck into?

26DEF4AE-BA80-4668-AD63-E2265569A011.jpeg

C32FFB33-0DB9-46E7-A258-837EECFF1D8F.jpeg

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Randyw

It almost reminds me of a cyclobatis but I know it can’t be that...

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Pemphix

May we have more infos about strata, location, size etc., pls. ?

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Fossildude19

Looks like some jumbled trilo-bits to me. 

Enlarged and brightened:

 

C32FFB33-0DB9-46E7-A258-837EECFF1D8F.thumb.jpeg.5e870cd1145a7d7a8417f265f6d3c719.jpeg

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AJ58

It looks like stingray but I don't know if thay are same age as trilobites.

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Fossildude19
3 hours ago, AJ58 said:

It looks like stingray but I don't know if thay are same age as trilobites.

They aren't. :( 

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Auspex
4 hours ago, Fossildude19 said:

Looks like some jumbled trilo-bits

I can see it as a fragment of arthropod exuvia.

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Randyw
6 hours ago, Pemphix said:

May we have more infos about strata, location, size etc., pls. ?

Unfortunately the seller didn’t have any information on it at all. Other then it was a Nevada trilobite. And I could see it as a cluster of bits but that doesn’t explain the carbon imprint around it.....I’m confused. Could the trilobite be faked and the piece is really Eocene in age?... I need to study this further. Thanks for all the replies so far you’re giving me other avenues to explore. The carbon outline doesn’t match exuvia though

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Randyw

I need to dig out my higher power magnifying glasses! LOL! I’m so stoked! the mystery alone is worth the price I paid for it!

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Sagebrush Steve

The piece looks like it might have come from the Oak Springs Trilobite Site near Caliente, Nevada.  That would make it Cambrian, and the trilobite most likely Olenellus.  Here is a thread I posted awhile back about something similar I found at that site.   See the comments from the expert I wrote to about what it might be.

 

 

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Randyw
17 hours ago, Fossildude19 said:

Looks like some jumbled trilo-bits to me. 

Enlarged and brightened:

 

C32FFB33-0DB9-46E7-A258-837EECFF1D8F.thumb.jpeg.5e870cd1145a7d7a8417f265f6d3c719.jpeg

Ok I took my higher power magnifying jewelers loud to it. They are not jumbled trilobits. They look like some kind of internal structure or “plates”

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Randyw

@Sagebrush Steve the trilobites May be olenellus although the head barbs look a little too long for that. There is one in there that I’m pretty sure is an olenellus. The trilobites are real. I can see some similarities to what you posted but I don’t see the strong center line of the tail? Backbone? Stem? Or the internal structures. If you look at the stain/carbon print closely you see where it basically forms a body outline. I’m not leaning towards skate or ray anymore so much the internal structures don’t look quite right and there’s no sign of the bones that should be around the perimeter of the outline

 

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Sagebrush Steve

Another possibility could be an ooid or pisoid, which are sedimentary concretions that form around a nucleus: https://en.m.wikipedia.org/wiki/Ooid.  They have been found in the Cambrian deposits in Nevada.  In this case the nucleus could be a trilobite molt. It does look like there could be a cephalon in the upper right center.  That could also explain the “wing” sticking off to the side.  But I’m no expert in this area.

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Randyw

Yes there are 5 trilobites Cephalons and one whole trilobite on the piece but once again there are no trilobite pieces in the “form” the wing you are mentioning are 3 pieces of “bone” “ plate” whatever it is laying together

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Sagebrush Steve

This is an interesting piece.  Could you post better photos of the trilobites?  That would help us determine the age of the piece.  If they are Olenellus, then the age is Cambrian.  That would eliminate the possibility of bone or leaf.  Also, it would be nice to see the whole trilobite.  Olenellus cephalons are fairly common, full trilobites much less so.

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Randyw

The seller I got it from has just  informed me that he believes its  cambrian and possibly part of the pioche? Shale.... I’m not sure it’s olenellus the genial spines seems a little long to me. But I’ll see if I can get picture of both the whole trilobite and the cephalons. The trilobite are just as I received them. I haven’t had a chance to work on them yet. I just split the piece. I’m loving the mystery! LOL! If you discount the “stain” it reminds me kind of an armored fish... tail with a bare hint of a caudal fin and a mass of plates. It doesn’t help that I think it split right through the middle so the bottom part is on one side and the top part is on the other. I’ll post some more pictures in just a minute

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Randyw

The one I got it from bought it from someone else who would not divulge their secret spot. It looks like they tried to clean up the trilobite and the cephalons some. These are the best pics I could get sorry

345DB146-F4A0-4879-A201-FFECBF30D657.jpeg

DF4C96B5-6D98-4EC5-9668-CC1ACF521F06.jpeg

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Randyw

That’s them exactly! Thanks!

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Randyw

We’re making great progress here!  We’ve identified the trilobites and the time frame! That seriously cuts down the possibilities thank you to everyone that’s contributed to this I’d mission so far!

 

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Sagebrush Steve
3 hours ago, Randyw said:

The seller I got it from has just  informed me that he believes its  cambrian and possibly part of the pioche? Shale.... I’m not sure it’s olenellus the genial spines seems a little long to me. But I’ll see if I can get picture of both the whole trilobite and the cephalons. The trilobite are just as I received them. I haven’t had a chance to work on them yet. I just split the piece. I’m loving the mystery! LOL! If you discount the “stain” it reminds me kind of an armored fish... tail with a bare hint of a caudal fin and a mass of plates. It doesn’t help that I think it split right through the middle so the bottom part is on one side and the top part is on the other. I’ll post some more pictures in just a minute

That’s what I thought. The Pioche shale is what you find at the Oak Springs Trilobite Site and the surrounding area.  Here is one paper you might find useful:

Cambrian Strat-Paleo-N-Ariz-S-Nev - small.pdf

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Randyw

Interesting reading but a little dry LOL! But it’s centered on trilobites and only makes a passing mention of other fossils being found but doesn’t list them.

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