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Tafoni at Salt Point State Park, Sonoma County, California.. Tafoni (singular: tafone) are cavities that develop in granular rock.. Although various definitions [example needed] can be found [by whom?] in the scientific literature, tafoni are commonly defined as small (less than 1 cm (0.39 in)) to large (greater than 1 meter (3.3 ft)) cavity features that develop in either natural or manmade ...
Salt crystallization (also known as salt weathering, salt wedging or haloclasty) causes disintegration of rocks when saline solutions seep into cracks and joints in the rocks and evaporate, leaving salt crystals behind. As with ice segregation, the surfaces of the salt grains draw in additional dissolved salts through capillary action, causing ...
Root tubules are cemented cylinders around a root mould. The cement is typically calcite and is responsible for the preservation of root morphology in otherwise poorly consolidated sediments. Root tubules can form while the root is still alive or during its decay, and often take the form of fine, needle-like calcite crystals that preserve the ...
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.
Image credits: soosseli The photographer continued: “Another challenge is often the conditions. I go out in any possible weather. The temperature may drop to -30 degrees Celsius, and to be able ...
Lomatium roots range from woody taproots to more fleshy underground tuberous-thickened roots.The plants are green and grow the most during the spring when water is available, and many species then set seed and dry out completely above ground before the hottest part of the year, while storing the energy they gained from photosynthesizing while water was available to them in their deep roots.
Ageratina altissima, also known as white snakeroot, [3] richweed, [3] or white sanicle, [4] is a poisonous perennial herb in the family Asteraceae, native to eastern and central North America.
Acorus calamus (also called sweet flag, sway or muskrat root, among many other common names [3]) is a species of flowering plant with psychoactive chemicals. It is a tall wetland monocot of the family Acoraceae , in the genus Acorus .