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Relative Dating of Rock Layers

Mike Sammartano via YouTube

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This introductory video explains how to determine the relative ages and sequence of geologic events from exposed rock cross-sections. It applies uniformitarianism and principles including superposition, original horizontality, cross-cutting intrusions, unconformities, and inclusions.

Syllabus

GEOLOGIC HISTORY Relative Dating of Rock Layers
The trilobite fossil is older than the dinosaur tooth fossil?
RELATIVE DATING Geologic Sequencing
UNIFORMITARIANISM
Geologic Cross-Sections
The layers of rock on the bottom are the oldest.
THE LAW OF SUPERPOSITION
THE LAW OF ORIGINAL HORIZONTALITY
Intrusions are younger than the rocks they metamorphose.
Unconformities represent a missing part of the rock record.
THE LAW OF INCLUSIONS

Taught by

Mike Sammartano

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