fowells Posted July 12, 2009 Share Posted July 12, 2009 I found these pieces of ? near one of the publicized Pennsylvanian sites (Graford formation?) in Runaway Bay, Lake Bridgeport, TX. My first thought, when I felt the sandpapery texture of the sides of the smaller piece was: This is shagreen! Wishful thinking? The group shot is of the normal Penn. stuff which I found within yards of the mystery pieces. I hope someone can shed some light on the matter. Link to comment Share on other sites More sharing options...
Guest N.AL.hunter Posted July 12, 2009 Share Posted July 12, 2009 Wild guess... shark fin spine thingy. Link to comment Share on other sites More sharing options...
fowells Posted July 12, 2009 Author Share Posted July 12, 2009 Wild guess... shark fin spine thingy. Like from the leading edge of the dorsal fin? Surely that tissue would be too soft to hold its shape through the fossilization process? Link to comment Share on other sites More sharing options...
Roz Posted July 12, 2009 Share Posted July 12, 2009 If you have a copy of Pennsylvanian Fossils of North Texas, check out page 119. It shows a pic of an unidentified ctenacantid shark spine fragment that looks like yours. It was found in the Graford Formation, Canyon Group, Lake Bridgeport area. Also there is more information on a pdf online at http://www.itano.net/fossils.htm PDF: Ctenacanthus and other chondrichthyan spines and denticles Welcome to the forum! Link to comment Share on other sites More sharing options...
fowells Posted July 12, 2009 Author Share Posted July 12, 2009 If you have a copy of Pennsylvanian Fossils of North Texas,check out page 119. It shows a pic of an unidentified ctenacantid shark spine fragment that looks like yours. It was found in the Graford Formation, Canyon Group, Lake Bridgeport area. Also there is more information on a pdf online at http://www.itano.net/fossils.htm PDF: Ctenacanthus and other chondrichthyan spines and denticles You got it. That was quick. I'll get the book. Link to comment Share on other sites More sharing options...
Shamalama Posted July 13, 2009 Share Posted July 13, 2009 Shagreen... is that like Shamwow but for fossils? -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
Auspex Posted July 13, 2009 Share Posted July 13, 2009 Shagreen... is that like Shamwow but for fossils? In this context, it would be sharkskin. "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...
moonmoth Posted July 13, 2009 Share Posted July 13, 2009 nice fossil fowells, another link to ctenacanthus spines for you http://digitallibrary.amnh.org/dspace/handle/2246/3535 Link to comment Share on other sites More sharing options...
Terry Dactyll Posted July 13, 2009 Share Posted July 13, 2009 Very Nice find...... well done.... 300 million year old sharks spine, makes meg look embryonic.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
mommabetts Posted July 13, 2009 Share Posted July 13, 2009 Very cool find. Link to comment Share on other sites More sharing options...
CreekCrawler Posted July 13, 2009 Share Posted July 13, 2009 Awesome finds! I like that area.It would be nice though if the houses weren't there Link to comment Share on other sites More sharing options...
fowells Posted July 17, 2009 Author Share Posted July 17, 2009 nice fossil fowells, another link to ctenacanthus spines for you http://digitallibrary.amnh.org/dspace/handle/2246/3535 Thanks. Link to comment Share on other sites More sharing options...
fowells Posted July 27, 2009 Author Share Posted July 27, 2009 nice fossil fowells, another link to ctenacanthus spines for you http://digitallibrary.amnh.org/dspace/handle/2246/3535 Thanks for the link. Took forever to download, but I learned something ichthy. Link to comment Share on other sites More sharing options...
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