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Spheroidal weathering is the result of chemical weathering of systematically jointed, massive rocks, including granite, dolerite, basalt and sedimentary rocks such as silicified sandstone. It occurs as the result of the chemical alteration of such rocks along intersecting joints.
The use of weathering rinds in relative dating is widely used in Arctic, Antarctic, and alpine regions and in the correlation of glacial moraines and tills and fluvial sediments and terraces. [6] [7] [8] In addition, weathering rinds have been used to determine the absolute amount of time gravel-size rock has been exposed to the weathering ...
Weathering is relatively slow, with basalt becoming less dense, at a rate of about 15% per 100 million years. The basalt becomes hydrated, and is enriched in total and ferric iron, magnesium, and sodium at the expense of silica, titanium, aluminum, ferrous iron, and calcium.
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.
It is quite common for spheroidal weathering, a form of chemical weathering, to occur as groundwater circulates through orthogonal joint sets in the near-surface. [10] This process results in the alteration and disintegration of bedrock adjacent to the joints.
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1/4 cup whole milk Greek yogurt . Appearance: Pleasingly crinkled top and deep mahogany color. Texture: Crustier edges with fudgy interior. Taste: Similar to the control, the chocolate flavor ...
Watson Lake in the Granite Dells The Peavine Trail Dells Granite showing spheroidal weathering.. The Granite Dells is a geological feature north of Prescott, Arizona.The Dells consist of exposed bedrock and large boulders of granite that have eroded into an unusual lumpy, rippled appearance.