More Pennsylvanian traces, Minkin site

Barnes and Noble in Tuscaloosa has signed copies of "Footprints in Stone," my book (with Ron Buta) about this great trace-fossil site.

Amphibian trackways (small, four-toed, forefeet)

Reptile trackways

Gas bubbles, large trackway (right), small trackway (middle)

New book about the site:

https://www.amazon.com/Footprints-Stone-Fossil-Coal-Age-Tetrapods/dp/0817358447/ref=sr_1_1?ie=UTF8&qid=1469578003&sr=8-1&keywords=kopaska-merkel