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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.
An etchplain is a plain where the bedrock has been subject to considerable "etching" or subsurface weathering.Etchplanation is the process forming etchplains. Contrary to what the name might suggest, etchplains are seldom completely flat and usually display some relief, as weathering of the bedrock does not advance uniformly.
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In biology, the BBCH-scale for bulb vegetables describes the phenological development of bulb vegetable plants, such as onion, leek, garlic and shallot, using the BBCH-scale. The phenological growth stages and BBCH-identification keys of bulb vegetables are:
Exfoliation joints wrapping around Half Dome in Yosemite National Park, California. Exfoliation joints in granite at Enchanted Rock State Natural Area, Texas, US. Detached blocks have slid along the steeply-dipping joint plane.
The Goldich dissolution series is a method of predicting the relative stability or weathering rate of common igneous minerals on the Earth's surface, with minerals that form at higher temperatures and pressures less stable on the surface than minerals that form at lower temperatures and pressures.
The Amaryllidaceae include many ornamental garden plants such as daffodils, snowdrops and snowflake, pot plants such as amaryllis and Clivia, and vegetables, such as onions, chives, leeks and garlic. A number of tropical lily-like plants are also sold, such as the belladonna lily , Amazon lily , blood lily (Cape tulip), Cornish lily (Nerine ...