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A rockfall or rock-fall [1] is a quantity of rock that has fallen freely from a cliff face. The term is also used for collapse of rock from roof or walls of mine or quarry workings. The term is also used for collapse of rock from roof or walls of mine or quarry workings.
Talus cones produced by mass moving, north shore of Isfjord, Svalbard, Norway Mass wasting at Palo Duro Canyon, West Texas (2002) A rockfall in Grand Canyon National Park. Mass wasting, also known as mass movement, [1] is a general term for the movement of rock or soil down slopes under the force of gravity.
Scree is formed by rockfall, [3] [6] which distinguishes it from colluvium. Colluvium is rock fragments or soil deposited by rainwash, sheetwash, or slow downhill creep, usually at the base of gentle slopes or hillsides. [7] However, the terms scree, talus, [2] [3] and sometimes colluvium [8] tend to be used interchangeably.
Rockslide at Oddicombe Beach in Devon, UK Rockslides in Nigeria Landslips. A rockslide is a type of landslide caused by rock failure in which part of the bedding plane of failure passes through compacted rock and material collapses en masse and not in individual blocks.
Draws are similar to valleys on a smaller scale; however, while valleys are by nature parallel to a ridgeline, a draw is perpendicular to the ridge, and rises with the surrounding ground, disappearing up-slope. It is usually etched in a hillside by water flow, is usually dry, but many contain an ephemeral stream or loose rocks from eroded rockfall.
Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...
Mortgage rates are holding steady as of Tuesday, February 11, 2025, pushing the 30-year fixed benchmark under 7.00% ahead of fresh consumer and wholesale inflation data this week.
A: Diagram illustrating the resistance to, and causes of, movement in a slope system consisting of an unstable block B: Diagram illustrating the resistance to, and causes of, movement in a slope system consisting of an unstable block. In some situations, the presence of high levels of fluid may destabilise the slope through other mechanisms ...