gturner333 Posted November 13, 2017 Share Posted November 13, 2017 I recently found this odd item and am trying to determine if it is a fossil, maybe a bivalve, or just geological. I found it at the Pennsylvanian site in Jacksboro, TX at Lost Creek Reservoir. The scale hash marks are 1mm. Thanks for any help. Link to comment Share on other sites More sharing options...
ynot Posted November 13, 2017 Share Posted November 13, 2017 I would guess sponge if I knew anything about sponges. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
JimB88 Posted November 13, 2017 Share Posted November 13, 2017 maybe a seed of some sort? Link to comment Share on other sites More sharing options...
DPS Ammonite Posted November 13, 2017 Share Posted November 13, 2017 I concur with JimB88: seed. Fossilized seeds occur in the dark Finis Shales. Could also be more modern seed such as variety of Hackberry. First photo looks most like a Hackberry seed. Show to V. Friedman, DPS member. She has lots of fossil seeds from the area. What is the makeup of the piece: limestone/calcite or modern woody? My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
gturner333 Posted November 13, 2017 Author Share Posted November 13, 2017 I do know the person in the DPS and will ask her. This is definitely not modern. It sinks like s rock (fossil) in water. It does look like some of the pictures i've deen of trigonocarpum and Cardiocarpon. Makeup of item is more limestone. Link to comment Share on other sites More sharing options...
Innocentx Posted November 13, 2017 Share Posted November 13, 2017 Here is PDF file with drawings of Carboniferous plant material. Around page 30 there are nuts. http://www.uky.edu/OtherOrgs/KPS/books/newberry1873/newberry1873plant.pdf "Journey through a universe ablaze with changes" Phil Ochs Link to comment Share on other sites More sharing options...
gturner333 Posted November 13, 2017 Author Share Posted November 13, 2017 Thanks for the link, Innocentx. I'm starting to lean toward Trigonocarpum, but need to research some more. This is great - my first seed. Link to comment Share on other sites More sharing options...
Herb Posted November 13, 2017 Share Posted November 13, 2017 Here is a Trigonocarpis sp, from that same site I collected a few years age,It does look similar. sorry about the picture. "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 Link to comment Share on other sites More sharing options...
jdp Posted November 13, 2017 Share Posted November 13, 2017 My first impression is chondrichthyan. Link to comment Share on other sites More sharing options...
fossilized6s Posted November 13, 2017 Share Posted November 13, 2017 This may help. Scroll down to @fiddlehead 's ID. ~Charlie~ "There are those that look at things the way they are, and ask why.....i dream of things that never were, and ask why not?" ~RFK ->Get your Mosasaur print ->How to spot a fake Trilobite ->How to identify a CONCRETION from a DINOSAUR EGG Link to comment Share on other sites More sharing options...
Wrangellian Posted November 14, 2017 Share Posted November 14, 2017 My first impression was a fusulinid but I might be way off base... are these not found at that site? Link to comment Share on other sites More sharing options...
gturner333 Posted November 14, 2017 Author Share Posted November 14, 2017 I have collected many fusulinids at Jacksboro and they often have the wavy lines like this fossil. But they are never this large or wide. The cross sections also are quite different with fusulinids having circular patterns of their chambers. Although, sometimes those chamber pattern are eroded away. They also tend to taper off at both ends. Thanks for your help. Link to comment Share on other sites More sharing options...
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