Geologic Time

In this module, we will explore the process of determining relative ages of rocks and geologic events.  This is a critical skill for determining the geologic time scale, and is necessary to interpret the geologic history of an area from geologic maps (the next module).

Principles of Relative Dating

Unconformities

Worked Example: Relative Geologic Time

Relative Ages 1

Relative Ages 2

Relative Ages 3

Relative Ages 4

The Geologic Time Scale