I'm Scott Wolter of America Unearthed. I'm a forensic geologist. Learn more about Forensic Geology here. My mission is to travel North America looking for unusual artifacts and mysterious sites.
Perhaps the History.com website says it best,
Scott Wolter of America Unearthed travels to Rock Wall, TexasI have to say the that I had never heard of the Rock Wall mystery prior to being informed about our making the episode. I wasn't all that excited at first, but filming this show turned out to be one of the most interesting geological phenomenon investigations I have ever done. When the excavation was first exposed I knew it was natural and not manmade. However, I was genuinely puzzled how it formed until I was able to spend some time looking at it. The geological setting that resulted in fluid sand at depth rising up through fractures in the overlying hardened clay was unique to say the least. The sand eventually was hardened by calcite into a dense and hard rock. What was truly amazing is how the fractures that formed within sandstone "wall" made it look just like stone blocks in a masonry wall. What looked like mortar between the stone blocks was actually sandy-clay from the surrounding rock that had squeezed between blocks. The result of Mother Nature's clever handiwork created a meandering wall that truly looks like the colossal work of an ancient lost civilization.
I want to thank Dr. John Geissman at the University of Texas in Dallas, for being such a good sport and providing the magnetization testing of the core samples we obtained in the "Big hole." He did a great job on camera and an even better job generating the magnetic "DNA of the rock" data in his lab. Thanks to his help we were able to get the critical data that helped us reach the proper conclusion.
As I said on the show, the City of Rockwall has much to be proud of. I like to tease my friends from Texas, but truth is the people down there could not have been more friendly and fun. Take it from me, they really do things "big" in Texas and that includes the Rock Wall!
Scott Wolter and Dr. John Geissman at the Rock Wall dig site after the final wrap for the episode.
Cameramen Colin Thrienen and Brandon Bouley shoot from the bucket of the backhoe over the Rock Wall dig site.
The Committee Films crew pose on a fire truck at the Fate City Fire Station in Texas.