Transcript text: What are the three common fault types?
Solution
The answer is the last one (Normal, reverse, strike-slip).
Explanation for each option:
Anticline, syncline, and monocline: These terms refer to types of folds in rock layers, not faults. An anticline is an arch-like fold, a syncline is a trough-like fold, and a monocline is a step-like fold.
Domes, basins, and monoliths: These terms describe large-scale geological structures. Domes are uplifted areas, basins are depressed areas, and monoliths are large, single massive rocks or mountains.
Horst, graben, and columner joints: Horst and graben are related to faulting but describe the blocks of crust that are uplifted or down-dropped between faults. Columnar joints are a type of fracture pattern in volcanic rocks, not a fault type.
Joint, fracture, graben: Joints and fractures are breaks in rocks without significant movement, and graben is a depressed block of land bordered by parallel faults. These are not fault types.
Normal, reverse, strike-slip: These are the three common types of faults. A normal fault occurs when the hanging wall moves down relative to the footwall, a reverse fault occurs when the hanging wall moves up relative to the footwall, and a strike-slip fault involves horizontal movement of blocks past each other.
Summary:
The three common fault types are normal, reverse, and strike-slip.