Table of Contents
Geologic Time (I)
Indicators of Former Life
Geologic Time (II)
Principle of Superposition
The Grand Canyon
Superposition and Original Horizontality
Correlation (I)
Correlation (II)
Cross Cutting Relationships
Reconstructing Earth History
Untangling Earth History
Unconformities
Instrusion of a Granite
Exposure and Erosion
Subsidence and Deposition
Deposition
Folding and Uplift
Erosion and Subsidence
Deposition
Angular Unconformity
Unconformity - Major Loss of Time
Unconformities in the Grand Canyon
Absolute Time
Half-Life
Implications for Heating the Primative Earth
Decay Schemes (I)
Uranium to Lead
Decay Schemes (II)
Rb87 to Sr87
K40 to A40 (a gas)
Absolute Ages Bracket Sedimentary Events
U to Pb Yields Radon (a gas)
Geologic Time Scale
Overview of Geologic Time
Geologic Time Spiral
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Author: John C Butler
Email: jbutler@uh.edu
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