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Exfoliating slabs of granite, on Half Dome in Yosemite National Park, USA. 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.
Spheroidal or woolsack weathering in granite on Haytor, Dartmoor, England Spheroidal weathering in granite, Estaca de Bares, A Coruña, Galicia, Spain Woolsack weathering in sandstone at the Externsteine rocks, Teutoburg Forest, Germany Corestones near Musina, South Africa that were created by spherodial weathering and exposed by the removal of surrounding saprolite by erosion.
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One possible extension of this theory to match with the compressive stress theory (outlined below) is as follows [3] (Goodman, 1989): The exhumation of deeply buried rocks relieves vertical stress, but horizontal stresses can remain in a competent rock mass since the medium is laterally confined. Horizontal stresses become aligned with the ...
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Some websites offer facilities to share slide presentations online. SlideShare allows the user to share presentations publicly or privately. Slides can be uploaded in various ways, via email and through social media are the most common ways of sharing the slides. [9] AuthorSTREAM only allows the user to upload PowerPoint presentation slides. On ...
Overall, weathering weakens the sample, and as it becomes more brittle, it fractures more easily. This is observed as a decrease in the yield strain , fracture strain , and toughness , as well as an increase in the Young's modulus and break stress (the stress at which the material fractures).
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