Relative Geologic Dating 

Relative Geologic Dating / 03A / Leighty / Physical Geology (GLG 101IN)
A review of the relative dating principles used to determine the proper geologic age order of rock sequences. Also covered are the different types of unconformities that can be present in a geologic sequence.
0:00 Relative Geologic Dating
0:36 Telling geologic time
1:37 Uniformitarianism
3:05 Relative & absolute dating
3:59 Eremita Mesa
5:02 Original Horizontality
6:20 Vermilion Cliffs
8:36 Superposition
10:42 Mather Point
11:13 Cross-cutting Relations
13:08 Inclusions
14:59 Boulder example
16:53 Unconformities
19:15 Angular unconformities
21:28 Making an angular unconformity
20:19 Basalt Cliffs
22:30 Nonconformities
23:30 Stephen Aisle
25:50 Making a nonconformity
27:03 Disconformities
29:55 Indian Gardens
30:53 Relative dating puzzle
33:39 Siccar Point
35:06 Outro