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Reef fossil ID


OreRockOn

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Hello, Ive been wracking my brains over this and I can't find anything close on Google but it really looks familiar.  This is from what I think is early Triassic Thaynes group near Minnetonka Cave in St. Charles Creek/Canyon (from a paper I couldn't download so I lost it) (west shore of Bear Lake) but there is Ordovician St. Charles Fm immediately to the west. The geologic maps I can find don't even show the Triassic but I collected the ammonite locality south of Liberty so I know it's at least in the area. Anyway I collected this little bugger at the site and I'm stumped (honestly the only fossils I know well are Eocene-Miocene marine in OR & WA). The bivalve (brachiopod?) is from the same site. I got a lesson in how not to do acid removal of limestone matrix so it's a little over-soaked lol.5f404cffb0438_P1120419(Large).thumb.JPG.a04c762742cd08860ea14f7e1f2ea4a7.JPG5f404cfeaada7_P1120418(Large).thumb.JPG.0033a8698cd95a52a748d242bddcd5b0.JPG5f404cfd9c68d_P1120417(Large).thumb.JPG.84e6421b5b1f4fad48328891cb5a24a4.JPG5f404cfb72445_P1120416(Large).thumb.JPG.81aa1f19192de62b5538845891ff7731.JPG5f404cfa81633_P1120411(Large)(Large).thumb.JPG.a4b164da343a07bdc3b9590485246813.JPG

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@OreRockOn, it would be easier to identify your 'bivalve' as bivalve or brachiopod if you can show us the side view of its valve/hinge.

 

The fossil in your first picture looks like a bryozoan, I think.

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On 8/24/2020 at 10:50 AM, Darbi said:

@OreRockOn, it would be easier to identify your 'bivalve' as bivalve or brachiopod if you can show us the side view of its valve/hinge.

The fossil in your first picture looks like a bryozoan, I think.

I took a couple more photos. I did get tentative confirmation that it's a bryozoan from Paul Taylor at the London Museum of Natural History, he offered to send the bivalve? off to someone for a better ID, could be Plagiostoma.  Having an interesting email exchange with him :) Also found this little blob in the dissolved matrix. Looks similar, 12mm across.

P1120421 (Large).JPG

P1120422 (Large).JPG

P1120423 (Large).JPG

St. Charles bryozoan blob (Large).jpg

St. Charles bryozoan blob 2 (Large).jpg

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I'd tip bryozoan as well.

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