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Exfoliation, separation of successive thin shells, or spalls, from massive rock such as granite or basalt; it is common in regions that have moderate rainfall. The thickness of individual sheet or plate may be from a few millimetres to a few metres. Some geologists believe that exfoliation results.
Recognizing the presence of exfoliation joints can have important implications in geological engineering. Most notable may be their influence on slope stability. Exfoliation joints following the topography of inclined valley walls, bedrock hill slopes, and cliffs can create rock blocks that are particularly prone to sliding.
Exfoliating granite is a granite undergoing exfoliation, or onion skin weathering (desquamation). The external delaminated layers of granite are gradually produced by the cyclic variations of temperature at the surface of the rock in a process also called spalling.
22 lut 2018 · Do exfoliation sheets slowly weather and peel away from the parent rock dome, or do they pop and fracture energetically? Are they legacy features of exhumation, or is their formation ongoing and...
Exfoliation is the peeling off of curved surfaces from rocks, also known as sheeting or spheroidal weathering. It is caused by various factors, such as cooling, hydration, expansion, and chemical changes of the rock.
Exfoliation is a physical weathering process that occurs in upland areas with coarsely crystalline igneous rocks. It involves the formation of cracks parallel to the land surface and the detachment of slabs of rock due to tension and chemical weathering.
28 mar 2016 · Exfoliation of rock deteriorates cliffs through the formation and subsequent opening of fractures, which in turn can lead to potentially hazardous rockfalls.
