[Last updated 5 Feb 2024]

Tarrant County, Texas
Aug. 22, 2009

Today Me and Roz hunted two localities in the Grayson formation.  
Locality #1 - This is a hidden area that been exposed for several years.  
Phymosoma sp. echinoid 1
Phymosoma sp. echinoid 2
Hemiaster calvini echinoid
Goniophorus sp. echinoid as found 
Multiple pics of the best and largest Goniophorus echinoid and a group shot with the three smaller ones :
Goniophorus sp. echinoids
Locality #2 - This is along a creek.  This location had several large Coenholectypus echinoids but they were all heavily damaged.  
Here are multiple pics of what maybe a Spondylus oyster but not sure.  It's got a huge beak/horn on the other valve like in the picture in "Texas Cretaceous Bivalves 2" page 155.
Spondylus sp.
Lopha sp. oyster