Historical Geology: Geologic Time, cross section2
26:38
Relative Dating of Rock Layers
12:46
How Do I Construct a Topographic Profile and Geologic Cross-Section from a Geologic Map?
8:45
Unconformities
6:21
Methods of Dating the Earth Part 1: Relative Dating
9:48
The Basics of Geology: Basic Unconformities
18:14
Rock Identification with Willsey: Intrusive Igneous Rocks (granite, granodiorite, diorite, gabbro)
4:15
What is the Principle of Cross Cutting Relationships?
26:12