45:23

Lecture 4 - Rocks Part 2

1:58:26

Lecture 6 - Geologic Time

19:26

Minerals with Willsey: Olivine, Pyroxene, and Amphibole

2:14:00

Lecture 12 - Precambrian Earth and Life History The Hadean and the Archean Eon

2:00:38

Lecture 5 - Plate Tectonics

24:25

Rock Identification with Willsey: BASALT and its many varieties

1:54:05

Lecture 7 – Rocks, Fossils and Time Part 2

1:23:06

Lecture 8 – Sedimentary Rocks, the Archives of Earth History Part 1