surfergirlatx Posted September 25, 2011 Author Share Posted September 25, 2011 Image from Texas Capitol building Maybe I have found it intact...with both sides>> ??? "The road to success is always under construction." Author Unknown. Link to comment Share on other sites More sharing options...
BobWill Posted September 25, 2011 Share Posted September 25, 2011 (edited) You're right the molds in the capitol limestone don't show the whole valve very well. There is a wide part and two narrow sections. This mold shows the wide part and one piece of the narrow "half". Here is an edge view of one showing the two narrow parts of both valves, and maybe what looked like "feet" on yours on the inside. Here is an impression in clay of that part of one valve. I've been meaning to post pictures of this trigonia anyway to show the hinge which I haven't seen before. It has a sort of "tab and slot" structure you don't see on a closed one seen here. Do you think the clay impression looks anything like yours? Edited September 25, 2011 by BobWill Link to comment Share on other sites More sharing options...
JohnJ Posted September 25, 2011 Share Posted September 25, 2011 Few more pics... Definitely a Trigonia sp. mold. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
Maniraptoran Posted September 25, 2011 Share Posted September 25, 2011 im thinking cnidarian sea pen check the link: http://www.google.com/search?client=safari&rls=en&q=sea+pen&oe=UTF-8&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&hl=en&tab=wi&biw=1052&bih=629 Link to comment Share on other sites More sharing options...
MikeD Posted September 25, 2011 Share Posted September 25, 2011 example of the Cretaceous fossil clam Trigonia Now that I see that particular side of the Trigonia example picture, it all makes sense. A very unique mold. Link to comment Share on other sites More sharing options...
surfergirlatx Posted September 25, 2011 Author Share Posted September 25, 2011 Now that I see that particular side of the Trigonia example picture, it all makes sense. A very unique mold. Thanks Mike!!! "The road to success is always under construction." Author Unknown. Link to comment Share on other sites More sharing options...
Maniraptoran Posted September 25, 2011 Share Posted September 25, 2011 um, you might want to check your facts on sea pens. i think you missed a few key details in your research. Link to comment Share on other sites More sharing options...
BobWill Posted September 25, 2011 Share Posted September 25, 2011 Scroll down to the "Classification and Interpretation" section of that Wikipage to see what Maniraptoran is talking about. Luckily all paleontologists totally agree on all this stuff so nothing is ever open to interpretation Link to comment Share on other sites More sharing options...
BobWill Posted September 26, 2011 Share Posted September 26, 2011 I agree that your fossil doesn't look like the pictures of modern sea pens. I think the point Maniraptoran was making is that the Ediacara biota is only one type of sea pen. Others exist today and there is disagreement on what belongs in what classification. I would like to see some pictures of cretaceous sea pens if anyone has any to make a comparison with your fossil. Link to comment Share on other sites More sharing options...
surfergirlatx Posted September 26, 2011 Author Share Posted September 26, 2011 (edited) I agree that your fossil doesn't look like the pictures of modern sea pens. I think the point Maniraptoran was making is that the Ediacara biota is only one type of sea pen. Others exist today and there is disagreement on what belongs in what classification. I would like to see some pictures of cretaceous sea pens if anyone has any to make a comparison with your fossil. Cant find a pic yet of cretaceous sea pen yet...but here is one image of it. It doesnt have the hole indentions in a row as the fossil I found does. That is my main reason to believe the "mystery" fossis cannot be the sea pen. - Kim Edited October 10, 2011 by surfergirlatx "The road to success is always under construction." Author Unknown. Link to comment Share on other sites More sharing options...
Auspex Posted September 26, 2011 Share Posted September 26, 2011 um, you might want to check your facts on sea pens. i think you missed a few key details in your research. It's not a sea pen, it's a Trigonia. Sheesh. "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Maniraptoran Posted September 26, 2011 Share Posted September 26, 2011 sorry for being vague back there these are the "key details" i thought you missed 1. sea pens are NOT exclusive to the Ediacaran period. they are still extant today. 2. sea pens may or may not have been alive during the Ediacara. trace fossils resembling them have been found in such strata (Charnia masoni, for instance), but the earliest unambiguous fossil of one is from the mid Cambrian. i also want to add that i am not married to my sea pen suggestion. i kind of said that on a lark. Link to comment Share on other sites More sharing options...
Vordigern Posted September 26, 2011 Share Posted September 26, 2011 all I know is Id like to have it in my collection, nice find Link to comment Share on other sites More sharing options...
surfergirlatx Posted October 10, 2011 Author Share Posted October 10, 2011 I found a second Trigonia impression today!!! Not as good as the first one, but its still nice "The road to success is always under construction." Author Unknown. Link to comment Share on other sites More sharing options...
ckmerlin Posted October 10, 2011 Share Posted October 10, 2011 Oddly compressed Trigonia? my first thoughts was this but compressed like you say Pterotrigonia (Trigonia) thoracica "A man who stares at a rock must have a lot on his mind... or nothing at all' Link to comment Share on other sites More sharing options...
surfergirlatx Posted October 13, 2011 Author Share Posted October 13, 2011 my first thoughts was this but compressed like you say Pterotrigonia (Trigonia) thoracica Thank you ckmerlin for attaching an image. Excellent quality example. "The road to success is always under construction." Author Unknown. Link to comment Share on other sites More sharing options...
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