Geologic Structures

Geologic structures are interesting because they reflect tectonic forces. Currently active forces can cause earthquakes; ancient forces reflect such major events as continental rifting, continental collisions, and strike-slip motions that would otherwise be hidden from scrutiny. Geologic structures are divided into faults, joints, and folds.

Normal Faults
Reverse Faults
Thrust Faults
Strike-slip Faults
General Evidence for Faults (Recent and Ancient)
Folds: Outcrop Scale
Folds: Landscape Scale

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