Below Lake Buchanan lies what the United States Geological Survey has described as one of the most significant deposits of rare-earth minerals in the world: Baringer Hill. 

Join us to listen as Rob Wilkes and Jean Hackett explain how this exotic pegmatite encrusted with radioactive crystals formed in the Llano Uplift, as well as its more modern history- including efforts by Thomas Edison and George Westinghouse to gain control of the forty-seven minerals found there.