37:31

Environments of Deposition - Part 1

24:24

Correlation - Part 2

23:50

Correlation - Part 3

19:33

Patterns in Evolution - Part 1

25:26

Patterns in Evolution - Part 2

21:53

Evolutionary Relationships of Vertebrates

29:43

Interpreting Geologic Maps - Part 3

34:17

An Introduction to Geologic Cross Sections - Part 1