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Spheroidal Weathering
Spheroidal weathering is a form of chemical weathering that affects jointed bedrock and results in the formation of concentric or spherical layers of highly decayed rock within weathered bedrock that is known as '' saprolite.'' When saprolite is exposed by physical erosion, these concentric layers peel (spall) off as concentric shells much like the layers of a peeled onion. Within saprolite, spheroidal weathering often creates rounded boulders, known as ''corestones'' or ''woolsack'', of relatively unweathered rock. Spheroidal weathering is also called onion skin weathering, concentric weathering, spherical weathering, or woolsack weathering.Fairbridge, RW (1968) ''Spheroidal Weathering.'' in RW Fairbridge, ed., pp. 1041–1044, The Encyclopedia of Geomorphology, Encyclopedia of Earth Sciences, vol. III. Reinhold Book Corporation, New York, New York. Ollier, C.D. (1971). ''Causes of spheroidal weathering. ''Earth-Science Reviews 7:127–141.Neuendorf, KKE, JP Mehl Jr., and JA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haytor Evening Light
Haytor, also known as Haytor Rocks, Hay Tor, or occasionally Hey Tor, is a granite Tor (rock formation), tor on the eastern edge of Dartmoor in the English county of Devon. Location The tor is at grid reference , near the village of Haytor Vale in the parish of Ilsington. There is an electoral ward with the same name. The population at the United Kingdom Census 2011, 2011 census is 2,862. History ''Idetordoune'' (1566), ''Ittor Doune'' (1687), ''Idetor'' (1737), ''Eator Down'' (1762) and ''Itterdown'' (1789) are a few recorded examples of earlier names by which Haytor was known. The name ''Haytor'' is of comparatively recent origin, and is probably a corruption of its old name and that of the Haytor Hundred, which covered the coastal area between the River Teign and River Dart, itself now considered to have been named after a lost village located somewhere between Totnes and Newton Abbot. In the 19th century steps were made to allow pedestrians up to the top of the tor and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
