Definition

Noun: * A type of geological fault: A gravity fault is an inclined fracture in the Earth's crust where the block of rock above the fault plane (the hanging wall) has moved downward relative to the block below (the footwall). This movement is primarily driven by extensional forces in the crust.

Usage

• Gravity faults are common in regions where the Earth's crust is being pulled apart, such as rift valleys.
• The term is used to describe the structure and formation of specific geological landscapes.
• Example: "The basin was formed by a series of gravity faults along its eastern margin."

Advanced Usage

• In structural geology, a gravity fault is essentially synonymous with a normal fault. The term emphasizes the role of gravitational forces in the downward movement of the hanging wall.
• Example: "The seismic data clearly shows the displacement pattern characteristic of a major gravity fault."

Variants and Related Words

• Normal fault (n): The more common technical synonym for a gravity fault.
• Extensional fault (n): A broader term for faults caused by crustal extension, which includes gravity/normal faults.
• Hanging wall (n): The block of rock that lies above an inclined fault plane.
• Footwall (n): The block of rock that lies below an inclined fault plane.

Synonyms

• Normal fault
• Extensional fault (in a specific context)

Antonyms

• Reverse fault: An inclined fault where the hanging wall has moved upward relative to the footwall, typically due to compressional forces.
• Thrust fault: A type of reverse fault with a very low angle of dip.

Noun

1. an inclined fault in which the hanging wall appears to have slipped downward relative to the footwall