Collin County, Texas
4 July 2025

Today I explored an exposure of upper Arcadia Park Formation (upper Eagle Ford Group).  Here I had an usually good hunt.
The first find was a possible reptile tooth.  After the reptile tooth I began finding "Ptychodus whipplei" teeth.
   
"Ptychodus whipplei" tooth (3 pics of same tooth)
     
The teeth so far.
   
After these great finds I moved on to an alternate location that exposes the Kamp Ranch Limestone.
   
  

Collin County, Texas
20 July 2025

Today I went back to the first stop from 4 July and found a few more shark teeth.
This is either a "Ptychodus mortoni" or "Ptychodus atcoensis" shark tooth. 
   
A "Cretodus" shark tooth and a fish vertebra.