A Couple Of Unknowns From Recent Trips...

[safossils]

I have no clue what this first imge is. It is from the Cambrian age Abrigo formation.

I think this second image is a bivalve rudist, but it does not look like any rudists I could find online. It is from the Early Cretaceous Mural Limestone.

Any help appreciated.

Walt

More Images

[Guest N.AL.hunter]

Don't know about the first one, but the second one looks like a trigonia in matrix.

[mdpaulhus]

This is a form of Echinoderm. I would have said that this was a Cystoid, but most cystoids didn't show up until the Ordovician. Still, there were some Cambrian cystoids such as Eocystites, so maybe not out of the question.

[safossils]

The first image does look like a Crinoid. I did not realize they went back that far, but the Abrigo is late Cambrian. I'll go with Cambrian age Echinoderm.

I think Trigonia is also correct. Thanks for that. I found an image that looks very similar at:

Trigonia

Again,

Thanks for the help

[Nicholas]

I don't see anything in the first but I will definitely agree with Trigonia as the second.

[mdpaulhus]

The first image does look like a Crinoid. I did not realize they went back that far, but the Abrigo is late Cambrian. I'll go with Cambrian age Echinoderm.

I think Trigonia is also correct. Thanks for that. I found an image that looks very similar at:

Trigonia

Again,

Thanks for the help

Echinoderms certainly go bact to the Cambrian. The classic Cambrian echinoderm that I am most aware of and have collected is the Eocrinoid Gogia spiralis which can be found in Utah. Carpoids are also similar in appearance, to a certian extent, and form this time period. I do think that the echinoderm route is definitely the direction to continue your research.