Why Geologists Drilling Deep Bedrock Cores Accidentally Struck a Dinosaur Fossil
The drilling rig was anchored into the red gravel plains near Guaizihu, in the barren expanse of the western Yin’gen-Ejinaqi Basin of Inner Mongolia, hunting for copper. The diamond-tipped drill bit, cooled by a steady torrent of pressurized mud, was grinding through the Lower Cretaceous bedrock nea ...