There is marine limestone at the top of Mount Everest. But how did it get there? That story, and the story of the creation of the state of California, both come back to the work of plate tectonics. In this archival interview from 1993, science writer John McPhee and geologist Eldridge Moores talk about the book Assembling California, and the study of rocks, minerals, and continental plates.
Produced by Charles Bergquist, Director and Contributing Producer