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
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