William Smith, 1815 Geologic map of England, Wales, part of Scotland The Map That Changed the World.
Geologic TimeConcepts and Principles Chapter 4 -How do we tell time in geology?...relative dating, absolute dating Absolute age dating: 4 methods: 1. Radiometric.
The Present is the Key to the Past James Hutton, 1700s.
Earth Processes and Rock Layers. Mountain Building Mountain building occurs when 2 continental plates of equal densities collide. – The plates crush together,
Geologic Time— Concepts and Principles Chapter 4.
“The Present is the Key to the Past”