Roz Posted November 11, 2012 Share Posted November 11, 2012 Thanks to trip leaders Polly and North Sulphur River King... Jacksboro is in the Upper Pennsylvanian, lower Graham Formation.. My best finds were two great Orodus teeth, a shark spine and a mystery tooth.. If anyone can ID the round mystery tooth it would be much appreciated.. The tooth below is the one that I could use help with.. That's a penny underneath Welcome to the forum! Link to comment Share on other sites More sharing options...
erose Posted November 11, 2012 Share Posted November 11, 2012 (edited) Roz, Here is a possibility from A Pictorial Guide to Fossils, 1982, Gerard R. Case, for the round tooth: Helodus sp. Pavement crusher tooth ascribed to a bradyodontid cartilaginous fish. his specimen is not an exact match but it is from the same age of strata up in Nebraska. From the same book, and others, the spine appears to be from Ctenacanthus. Those Orodus are a nice pair. ER Edited November 11, 2012 by erose Link to comment Share on other sites More sharing options...
JohnJ Posted November 11, 2012 Share Posted November 11, 2012 Very nice finds and photos, Roz. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
NSRhunter Posted November 11, 2012 Share Posted November 11, 2012 That was a a fun trip!!!! Link to comment Share on other sites More sharing options...
Foshunter Posted November 11, 2012 Share Posted November 11, 2012 Roz, The Orodus tooth is amazing, one of these days, when I am back in Texas, Jacksboro will be on my visit list. The mystery tooth almost has a Ptychodus look to it, unusual-----Tom Grow Old Kicking And Screaming !!"Don't Tread On Me" Link to comment Share on other sites More sharing options...
Missourian Posted November 11, 2012 Share Posted November 11, 2012 Wonderful teeth. Is the first one in a nodule? Context is critical. Link to comment Share on other sites More sharing options...
Roz Posted November 11, 2012 Author Share Posted November 11, 2012 Thanks so much Erose.. That is a book that I don't have.. I can't find many images but a few show the round dome .. The description on a few say, (distinct tubular dentine) which mine doesn't have unless it has broken off.. The area that is by the root looks different compared to the ones online.... That would be a first Helodus for me and more than welcome! I think you are dead on with the spine being a Ctenacanthus spine! Welcome to the forum! Link to comment Share on other sites More sharing options...
Roz Posted November 11, 2012 Author Share Posted November 11, 2012 Wonderful teeth. Is the first one in a nodule? Yes partially covered.... The other also has what appears to be nodule material on it also. I am going to use a dental pick to get most of it off unless it looks like I might damage it.. Welcome to the forum! Link to comment Share on other sites More sharing options...
Roz Posted November 11, 2012 Author Share Posted November 11, 2012 Very nice finds and photos, Roz. Thanks, John! You will have to travel up this way after a few heavy rains.. Welcome to the forum! Link to comment Share on other sites More sharing options...
Roz Posted November 11, 2012 Author Share Posted November 11, 2012 Roz, The Orodus tooth is amazing, one of these days, when I am back in Texas, Jacksboro will be on my visit list. The mystery tooth almost has a Ptychodus look to it, unusual-----Tom Thanks, Tom.. When you come to Texas let me know.. I'll bet we could get a few forum members at Jacksboro at the same time.. It's a very large area and some fossils are also found on the flat area.. That's where I found the spine. Welcome to the forum! Link to comment Share on other sites More sharing options...
Roz Posted November 11, 2012 Author Share Posted November 11, 2012 That was a a fun trip!!!! Yes it was.. It was 3:30 when I reached my car.. I was the last one out.. I love that site! Welcome to the forum! Link to comment Share on other sites More sharing options...
trilobiteruss Posted November 11, 2012 Share Posted November 11, 2012 Love those areas for collecting! Always good material! Link to comment Share on other sites More sharing options...
tessweaver Posted November 12, 2012 Share Posted November 12, 2012 Roz, We wondered whose car that was. Didn't know if someone had car trouble or car pooled to another location. My daughter and I left at 3:00 and headed for Bridgeport where we ran into some DPS members from Jacksboro at a roadcut loaded with crinoids. Jacksboro really was a great site and the Bridgeport stop just topped off our day. No teeth were found, but I've now got more horn coral and crinoid stems and cups than I know what to do with. Link to comment Share on other sites More sharing options...
Nandomas Posted November 12, 2012 Share Posted November 12, 2012 (edited) Great hunt. I am not sure about Helodus. I didn't find nothing exactly matching your tooth. It could be an undescribed specimen Edited November 12, 2012 by Nandomas Erosion... will be my epitaph! http://www.paleonature.org/ https://fossilnews.org/ Link to comment Share on other sites More sharing options...
fossiladdict Posted November 12, 2012 Share Posted November 12, 2012 Cool finds Roz, wished I could have made it. I am thinking Helodus sp. as well, but not seeing the ridges on the side like they seem to have. Fossils are simply one of the coolest things on earth--discovering them is just marvelous! Makes you all giddy inside! Link to comment Share on other sites More sharing options...
sward Posted November 12, 2012 Share Posted November 12, 2012 Roz and her Penn finds... You're always finding some kind of unusual/unknown material from the Penn. As usual, you've got some beautiful stuff there. It looks like ya'll had a great time. SWardSoutheast Missouri (formerly Dallas/Ft. Worth, TX) USA Link to comment Share on other sites More sharing options...
Roz Posted November 12, 2012 Author Share Posted November 12, 2012 Yes, it was a good trip! I received an answer to an email I had sent out to an expert in this age fish and sharks. He says that while it could be Helodus, the hemispherical shape of the crown doesn't fit the standard tooth shapes associated with Helodus.. Welcome to the forum! Link to comment Share on other sites More sharing options...
Roz Posted November 12, 2012 Author Share Posted November 12, 2012 Roz, We wondered whose car that was. Didn't know if someone had car trouble or car pooled to another location. My daughter and I left at 3:00 and headed for Bridgeport where we ran into some DPS members from Jacksboro at a roadcut loaded with crinoids. Jacksboro really was a great site and the Bridgeport stop just topped off our day. No teeth were found, but I've now got more horn coral and crinoid stems and cups than I know what to do with. I am glad you did well! I saw you but you two were so far away I had no idea who it was.. Welcome to the forum! Link to comment Share on other sites More sharing options...
Nandomas Posted November 12, 2012 Share Posted November 12, 2012 Yes, it was a good trip! I received an answer to an email I had sent out to an expert in this age fish and sharks. He says that while it could be Helodus, the hemispherical shape of the crown doesn't fit the standard tooth shapes associated with Helodus.. that's my opinion too Erosion... will be my epitaph! http://www.paleonature.org/ https://fossilnews.org/ Link to comment Share on other sites More sharing options...
Roz Posted November 12, 2012 Author Share Posted November 12, 2012 Wonderful teeth. Is the first one in a nodule? I don't think I answered clearly in my response to your question.. It was not in a nodule I opened but it does look to me as if it was in one at some point... It has the look to me anyway.. Welcome to the forum! Link to comment Share on other sites More sharing options...
Missourian Posted November 12, 2012 Share Posted November 12, 2012 I don't think I answered clearly in my response to your question.. It was not in a nodule I opened but it does look to me as if it was in one at some point... It has the look to me anyway.. I wasn't clear in my question either. Even though I've seen many concretions with fossils exposed on the outside, I still think of the fossils being 'in' them. Context is critical. Link to comment Share on other sites More sharing options...
Chrisw422 Posted November 12, 2012 Share Posted November 12, 2012 Awesome finds! Link to comment Share on other sites More sharing options...
erose Posted November 12, 2012 Share Posted November 12, 2012 I wasn't clear in my question either. Even though I've seen many concretions with fossils exposed on the outside, I still think of the fossils being 'in' them. There is a section of the exposure near the top as it transcends into the Jacksboro Limestone that has that light tan, hard limestone. I don't believe these would qualify as concretions in the typical sense. I have a few specimens from it that also have that fine limestone attached. And it's hard stuff too. Good luck with any prep. Link to comment Share on other sites More sharing options...
Boneman007 Posted November 12, 2012 Share Posted November 12, 2012 To put these finds in perspective, I like to think of it this way: For every 100 Miocene teeth you find, it takes the same effort to find 1 cretaceous tooth. For every 100 cretaceous teeth you find, it takes the same effort to find 1 Pennsylvannian tooth. In other words.... VERY WELL DONE!!! Link to comment Share on other sites More sharing options...
Roz Posted November 13, 2012 Author Share Posted November 13, 2012 To put these finds in perspective, I like to think of it this way: For every 100 Miocene teeth you find, it takes the same effort to find 1 cretaceous tooth. For every 100 cretaceous teeth you find, it takes the same effort to find 1 Pennsylvannian tooth. In other words.... VERY WELL DONE!!! Thanks, Boneman007! Welcome to the forum! Link to comment Share on other sites More sharing options...
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