27:48

Geology 101 with Willsey, Episode #7: Minerals, Part One

43:36

How Geologists Discovered and Mapped a Great Seaway

17:00

How An Ancient Ocean Shaped US History

46:17

The Line Time Erased; Where Will It Be Drawn In The Future?

18:52

Glacial Lake Missoula

36:55

Appalachian Geology: Surprising Implications

11:20

The Caucasus Mountains explained

34:13

The Mountain Range That Disappeared and Came Back Again