Need ID Anchura? Cerithium?

[Lone Hunter]

I can't seem to find a match for these gastropods, closest I've seen is Cerithium Turriculatum. I hesitate to say they are Cretaceous since I find things in this creek that aren't, this part of creek is QAL, Qt, and Eagle Ford with a little Permian mixed in. There is a pyritized fossil and also something round that I first thought bivalve or different gastropod but it seems too round.  Thanks for looking!

Edited September 29, 2021 by Lone Hunter

[Lone Hunter]

Are gastropods that boring?

[Thomas.Dodson]

23 minutes ago, Lone Hunter said:

Are gastropods that boring?

I don't think so. That said I'm hesitant to weigh in without doing some research and knowing the exact age. The missing/unexposed spire on the non-ribbed one also makes things difficult. Do you have a copy of Texas Cretaceous Gastropods? I ordered a copy when I was back in North Dakota but it was delayed because of the tropical storm and then I moved back down here. It should be waiting in North Dakota but I can't pick it up any time soon.

[Lone Hunter]

No that's on my list to get,  I'm thinking they may be Permian, I saw a few others that looked like a match but they were all unidentified.

[JohnJ]

Try to identify the matrix.  Is it soft or hard?  Does the color in your photo match the specimen?  What other fossils are in that rock?

[erose]

I don't see Cerithium.  Problem is that so many gastropods are known from steinkerns only or the other way around.  They look Cretaceous to me.  Like JohnJ said you need to get a better handle on the provenance.  You say there are both Eagle Ford and Permian(?) deposits along with much younger stuff.  My guess is that a written description of those two units will help sort this out.  Maps are fine but it will be the written descriptions of the strata that nails it.

[Lone Hunter]

Yes color is accurate, it is hard but grainy and slowly dissolves in vinegar but not evenly, inc picture that shows holes ate away. There are these bivalves and parts of something, I can't tell, and poss different gastropod, and strange dark blob.  That's all the clues.

[Lone Hunter]

4 minutes ago, erose said:

I don't see Cerithium.  Problem is that so many gastropods are known from steinkerns only or the other way around.  They look Cretaceous to me.  Like JohnJ said you need to get a better handle on the provenance.  You say there are both Eagle Ford and Permian(?) deposits along with much younger stuff.  My guess is that a written description of those two units will help sort this out.  Maps are fine but it will be the written descriptions of the strata that nails it.

Location of the creek is in Trinity river floodplain, it constantly has things moved downstream by floodwaters that come through Woodbine, Eagle Ford, then mixes with Alluvial gravels, plus there is a lot of fill rock along the way that gets mixed in which is where I'm assuming the crinoids come from. So can't be much help on accurate strata, it's all sand and gravel banks.

[Lone Hunter]

Cleaned up spire best I could,  shows part of steinkern maybe that will help.

[BobWill]

The last one looks a little like Polinices sp.

Edited September 30, 2021 by BobWill
clarification

[DPS Ammonite]

I don’t have access to some of my Dallas Paleo books now. I remember a pre 2013 book that  illustrated and described Eagle Ford gastropods. Anyone have a copy that they can look for a similar gastropod?

 

@BobWill

Edited September 30, 2021 by DPS Ammonite