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Please confirm if these are corals


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Lone Hunter

All of these came from Alluvial gravels in creek close to Trinity river. Only one I'm confident about is first one, obviously coral, but is it recent and should it have been here? It feels and clinks like glass. Next one I'm not sure if it's geological or not, seems to have well defined tubes of some sort.  Next one lacks detail, plant, borrows,coral? Last one I thought was shell but looking at the rest of it not so sure, looks like it had a center with the tubes surrounding it, coral? rugose? Oh and second one is same size as last one.  

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Edited by Lone Hunter
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  • Lone Hunter changed the title to Please confirm if these are corals
Lone Hunter

I can't learn if I don't get answers so being persistent :)

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Ludwigia

I don't think that any of them are.

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Lone Hunter

If this isn't coral then what is it?

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Rockwood
27 minutes ago, Lone Hunter said:

If this isn't coral then what is it?

Molds of crinoid bits embedded in a bryozoan.

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Lone Hunter

How cool! Thank you for coming to my rescue, I have confidence in your keen eye :look:

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Rockwood
2 hours ago, Lone Hunter said:

I have confidence in your keen eye

Thanks for the vote of confidence, but it's probably a good idea to wait for a second set to back me up on this.

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Myrmica

I also agree that the first specimen is a bryozoan.

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Rockwood

The 6th 7th, and eighth photos are ichno fossils. Something in a planolite I believe. 

The last set I'm going to wing a Texas rule rudist in from left field on. :)

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Lone Hunter

I forgot all about rudist!  How the heck do you tell the difference between a peice of that vs peice of rugose?  Learned a new word, planolite :) Also found the other little peice of that, from same spot, same kind of rock. Added close ups of both.

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ClearLake

First one looks more bryozoan than coral, but then we don’t really have a scale. Second one looks like a piece of limestone. Third one looks like trace fossils. Fourth one looks like some calcite but can’t really tell what the tube looking things are or really even if they are tubes. 

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Lone Hunter

Sorry I forgot scale!  So everything I'm seeing in the holes are crinoid peices?

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Rockwood

Oh oh. :shakehead:

' gotta back up a little. 

I think the shapes I took for crinoid pieces may be coincidental. In these photos all I see in the holes is last generation's holes (zooecia).

The trace fossils may also be a better fit with chondrites. That one has been bugging me all afternoon. Finally found it in an image search. :)

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Lone Hunter

I'm confused, thought Chondrite was in meteors?  Were you referring to the bryzoan or 3rd set of pics? Added a few more images.

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Top Trilo
1 minute ago, Lone Hunter said:

I'm confused, thought Chondrite was in meteors?  Were you referring to the bryzoan or 3rd set of pics? Added a few more images.

 

Both here is the genus, been around since the cambrian (Chondrites)

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Lone Hunter

Now I got it,  I came up with Thalassinoids. Finally found the other peice I had here's some pics. Only thing throwing me off is the bulbous drippy looking things on small peice.

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Lone Hunter

Had a hard time trying to capture images of certain parts that still look like coral to me?

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Lone Hunter

Hoping to get confirmation whether this is Chondrite or not. 

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ClearLake

All of those last photos appear to show bryozoans. If the holes are tiny (think pinhead size or smaller) and you don’t see septa then it is probably a bryozoan. And yes, there are plenty of exceptions but that is a good rule of thumb to get you started on distinguishing between the two. I used to have a decent website that showed how to distinguish, but I can’t remember it at the moment. 

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Fossildude19

I agree - Bryozoans. 

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Rockwood

Good dry photos.

Yup. Bryozoans. 

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Lone Hunter

Thanks everyone!  I had considered bryozoan but didn't think it grew like that.  Got a shot of the inside of one  and some kind of opening, what is it?

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