michaelzzz Posted July 29, 2017 Share Posted July 29, 2017 According to geologic map this location belongs to Austin Chalk. This is a construction site, the rock color change from tan to gray. I found this specimen in the gray shale like matrix. Is it a baby Ptychodus tooth? I have never seen a flat top before Link to comment Share on other sites More sharing options...
doushantuo Posted July 29, 2017 Share Posted July 29, 2017 http://www.thefossilforum.com/index.php?/topic/76439-wellknown-fish/ I can also recommend the Hamm thesis,which is prolly in Fruitbat's library Link to comment Share on other sites More sharing options...
doushantuo Posted July 29, 2017 Share Posted July 29, 2017 Hamm,NOTthethesis http://www.thefossilforum.com/index.php?/topic/14530-ptychodus-id-quick-guide/ Link to comment Share on other sites More sharing options...
PFOOLEY Posted July 29, 2017 Share Posted July 29, 2017 Yes, it is broken P. whipplei tooth. 1 "I am glad I shall never be young without wild country to be young in. Of what avail are forty freedoms without a blank spot on the map?" ~Aldo Leopold (1887-1948) New Mexico Museum of Natural History Bulletins Link to comment Share on other sites More sharing options...
michaelzzz Posted July 29, 2017 Author Share Posted July 29, 2017 Didn't cross my mind it was broken. Thank you @doushantuo @PFOOLEY. Link to comment Share on other sites More sharing options...
PaleoRon Posted July 29, 2017 Share Posted July 29, 2017 It is a Ptychodus tooth that seems to have some pretty severe feeding wear on it. 1 Link to comment Share on other sites More sharing options...
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