1:32:48

Geology 16 (Mountains)

38:33

Geology 14 (The Ocean Floor)

1:48:07

Geology 7 (Volcanoes)

29:20

Geology 8 (Weathering and Erosion)

45:09

Geology 10 (Sedimentary Rocks)

1:10:04

Geology 17 (Landslides and Mass Wasting)

43:05

Geology 18 (Rivers and Springs)

49:34

Geology 11 (Metamorphic Rocks)