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USGS CMG InfoBank: Fault Types

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Comment: 10:36 - 11:36 (01:00)
Source: Annenberg/CPB Resources - Earth Revealed - 8. Earth's Structures
Keywords: structure, "tectonic activity", "James Sadd", fracture, fault, "dip-slip fault", "strike-slip fault", "oblique-slip fault", "left lateral", "right lateral", earthquake, deformation

Our transcription: Like folds, faults are classified according to their physical orientation.
This includes the dip of the fault plane and the direction of offset created by movement along the fault.
For example, ruptures along which vertical motion has occurred, are called "dip slip faults".
Ruptures along which horizontal motion has occurred are called "strike-slip faults".
Many faults show some combination of both dip slip and strike slip motion.
These are called "oblique slip faults".
Geologists have found it useful to subdivide fault types even further.
Strike slip faults, for example, are subdivided according to whether their direction of offset is to the left or the right.

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