What is a thrust fault?

A fault where deeper rock moves on top of shallower rock.

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  1. A fault where deeper rock moves on top of shallower rock ✔
  2. A fault where plates slide sideways
  3. A crack filled with crystals

Why: In the shallow crust under compression, thrust faults form and deeper rock moves on top of shallower rock.

Huh, didn't know that: In the shallow crust under compression, thrust faults form and deeper rock moves on top of shallower rock.

The dad joke
Thrust faults push the point.
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References

Answer: A fault where deeper rock moves on top of shallower rock. In the shallow crust under compression, thrust faults form and deeper rock moves on top of shallower rock.

  1. Geology en.wikipedia.org/wiki/Geology
    thrust faults form, which causes the deeper rock to move on top of the shallower rock
    Checked 2026-11-07.

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