Fault (geology)

In geology, a fault is a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement as a result of rock mass movement. Large faults within the Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes.

A fault plane is the plane that represents the fracture surface of a fault. A fault trace or fault line is the intersection of a fault plane with the ground surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault.

Since faults do not usually consist of a single, clean fracture, geologists use the term fault zone when referring to the zone of complex deformation associated with the fault plane.

The two sides of a non-vertical fault are known as the hanging wall and footwall. By definition, the hanging wall occurs above the fault plane and the footwall occurs below the fault. This terminology comes from mining: when working a tabular ore body, the miner stood with the footwall under his feet and with the hanging wall hanging above him.

Fault line (disambiguation)

In geology, fault line or faultline refers to the surface trace of a fault.

Books

Film and television

Role-playing games

Music

Fault Line (adventure)

Fault Line is a role-playing game adventure published by TSR in 1985 for the Marvel Super Heroes role-playing game.

Contents

Fault Line is a scenario in which Spider-Man, Captain America, the Wasp, and the Black Knight have a limited amount of time in which to save New York City from destruction by an earthquake.

Publication history

MH8 Fault Line was written by Kim Eastland, and was published by TSR, Inc., in 1985 as a 16-page book, a large color map, and an outer folder.

References