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Radiolitid ?


Frankie

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I found this fossil in a nearby creek here in Cabo Rojo,Puerto Rico. I was told it is a Radiolitid but I do not know much else and was hoping you guys can give me more information like from what time period they are from and is this a common size for them,etc. Thanx.

Note: The diameter of this quarter is exactly one inch.

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Yes that is a rudist. I don't know the area so I can't pin down the species but Radiolitid is pretty good I think. Common size isn't a matter of big they get but rather how long they get. Most rudists are during the Cretaceous Period, at least the ones I find, and they were reef builders much like coral is today. There is a lot of information out there especially for ones in your area. I have found a few PDF files pertaining to your region regarding rudists. I will see if I have a chance tonight to upload them. Don't let anyone lie to you, rudists are cool.

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Thanx Ryan....Is the gap between the outer layers normal or was this radiolitid deformed during fossilization?

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Edited by Frankie
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From what I see in the pictures it looks normal. Most of mine have crystals on the inside. Have you found any others?

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So far this is the only one but every time I go to the creek I am always on the lookout. I even taught my kids and their friends to be on the lookout when they go to the creek. Back in 2004 we went to a creek at the sierra bermeja mountain range a few miles from my house and one of the kids found a small rock with a perfect imprint of a leaf on it and I told him to keep it in a safe place. Last year I asked about it and he said he lost it. I never got an ID on it nor did I photograph it. Live and learn.

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I forgot about this one. This one looks like it can also be a Radiolitid only larger. I took a photo of the bottom and then the top and as you can see the top of this one looks different than the other smaller one I posted. looks like this one is missing the top shell. Let me know what you think. Thanx.

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Bottom View

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Top View

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nice specimen

"Absence of evidence is not evidence of absence"_ Carl Sagen

No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go.

" I think, therefore I collect fossils." _ Me

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes

"can't we all just get along?" Jack Nicholson from Mars Attacks

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nice specimen

Thanx. would you believe that it was sitting on a canopy for over a year? I used it as a paper weight to prevent the wind from blowing away the tarp I was using while painting. It was hard to get to when I removed the tarp so I left it there and forgot about it till yesterday when Ryan asked if I had any more radiolitids.

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Thanx Ryan. They have some very interesting photos. It looks like slicing them brings out more detail but I'm not sure I want to that to mine just yet.

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Never sliced mine. I hadn't thought of it but I have plenty to experiment on. If those are the only two you have then I would keep them the way they are except for a little prep work.

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Never sliced mine. I hadn't thought of it but I have plenty to experiment on. If those are the only two you have then I would keep them the way they are except for a little prep work.

I'll see what I can do as far as preping it. Thanx.

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