2:34:32

Brief Overview of Black Hills Geology/Gold and the Black Hills

25:13

Can You Find Gold In North Carolina? Top Spots Revealed!

1:01:28

A Brief Geologic History of Colorado

1:35:01

Constructing Oregon

1:11:55

Tales Told By Trilobites

1:14:24

Applying Structural Geology to Hydrothermal Mineralisation

19:17

Rock Identification with Willsey: Nonfoliated Rocks - Quartzite and Marble

1:24:15

The River That Flows Uphill: Geologic evolution of the upper Mississippi River valley...