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What's left of rugose coral?


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Lone Hunter

I have zero experience with corals, so just going by pictures I've seen on this guess. This was in creek with Alluvium/ Eagle Ford mix, I spent about an hour prepping it to expose the top and smooth side of what was a mound with vague outline. Hope I didn't screw it up too much!  

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LabRatKing

Yup, you nailed it. This is a a rugose coral.

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Lone Hunter

Thank you for confirming!

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If it´s Cretaceous it´s not a rugose coral.

Edited by oyo
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LabRatKing
6 hours ago, oyo said:

If it´s Cretaceous it´s not a rugose coral.

Why would it be cretaceous? Given this is an alluvium find, there is no way to determine age, or even source. However morphology is consistent with a rugose coral.

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Lone Hunter

I am always finding things that don't belong in this area for the reason stated above, in addition there is a lot of fill/erosion control rocks mixed in as I have learned. Also have things collected from area in the Trinity river flood plain near Lone Star park thats mixed in.  Makes it more difficult to learn and ID things for sure.

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3 hours ago, LabRatKing said:

Why would it be cretaceous? Given this is an alluvium find, there is no way to determine age, or even source. However morphology is consistent with a rugose coral.

In tags she said :  coral cretaceous.

If it's rugose coral it's not cretaceous.

Do you like it better like this?

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Lone Hunter

I see how that was confusing in the tags, I was just referring to the the age of this area, which does not always match up with what the creeks and such bring.

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FranzBernhard

@LabRatKing, @oyo,

so lets speak the specimen for itself: What do you think, rugosa or scleractinian? From the texbook, the differences should be clear, but can we really decide for this out-of-context specimen? I can not decide...
Franz Bernhard

 

Edited by FranzBernhard
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Lone Hunter

Would the appearance of the 'button' in the middle (plate?) make it rugosa? 

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LabRatKing
5 hours ago, FranzBernhard said:

@LabRatKing, @oyo,

so lets speak the specimen for itself: What do you think, rugosa or scleractinian? From the texbook, the differences should be clear, but can we really decide for this out-of-context specimen? I can not decide...
Franz Bernhard

 

image.jpeg.e03417babbd608e75f53e05adf50bc46.jpeg

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LabRatKing
8 hours ago, Lone Hunter said:

I am always finding things that don't belong in this area for the reason stated above, in addition there is a lot of fill/erosion control rocks mixed in as I have learned. Also have things collected from area in the Trinity river flood plain near Lone Star park thats mixed in.  Makes it more difficult to learn and ID things for sure.

That is the nature of alluvium- stuff washed down by a river. Plus, as you say we humans move a lot of rock around.

 

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Hace 8 horas, FranzBernhard dijo:

@LabRatKing, @oyo,

Así que permite hablar el espécimen por sí mismo: ¿Qué opinas, rugosa o scleractiniana? ¿Qué es la de la película, pero ¿podemos decidir realmente por este tipo de fuera de la cuencia? No puedo decidir...
Franz Bernhard

 

Oh no, I don't know. If cretaceous must be Scleractinia but if no sure stratigraphy ....... pssss.

 

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