Texas is known worldwide as a rich resource for the intricate Cretaceous-age echinoids widely sought by professional and amateur paleontologists. With much of t

Collector's Guide to Fort Payne Crinoids and Blastoids is the first comprehensive guide for identifying the fossils of echinoderms from hundreds of millions of

A photographic guide to Oklahomas Devonian trilobites. The geological history of Coal County, Oklahoma. Descriptions of rock formations where trilobites are fou