26:01

Surprising Implications of a Cave Discovery

28:18

How Geologists Determine the Age of Mountains

38:43

Investigate mysterious features with a geologist

25:04

Learn how nature forms these beautiful patterns and how to identify them in ancient rock formations

25:24

An Unusual Sandstone Monument: Where Did It Come From? Where Did It Go?

29:28

An ordinary looking Nevada mountainside reveals extraordinary geology and beauty.

21:46

Learn to Identify Rivers in the Rock Record with a Geologist

18:29

Secret Tunnel Leads to Massive Gold Deposit