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Pediment surface at base of Book Cliffs, Utah A pediment , also known as a concave slope or waning slope , [ 1 ] is a very gently sloping (0.5°–7°) inclined bedrock surface. [ 2 ] It is typically a concave surface sloping down from the base of a steeper retreating desert cliff , escarpment , [ 3 ] or surrounding a monadnock or inselberg ...
Enayat Ahmad (1 August 1923 – 10 December 1999) was an Indian geographer known for his contribution to the study of the geography of India, especially his interpretation of the evolution of drainage systems in the Himalayas and his writings on tropical coastal geomorphology. [1] [2] He wrote books on geomorphology, geology, and the Himalayas ...
A horst is a section of crust that has been lifted relative to the blocks on either side, which is a result of its bounding faults dipping away from each other. [2] Horsts can form features such as plateaus, mountain ranges or ridges on either side of the valleys.
Talus cones produced by mass moving, north shore of Isfjord, Svalbard, Norway Mass wasting at Palo Duro Canyon, West Texas (2002) A rockfall in Grand Canyon National Park. Mass wasting, also known as mass movement, [1] is a general term for the movement of rock or soil down slopes under the force of gravity.
Localized geology and geomorphology topics for various parts of the Himalaya are discussed on other pages: Geology of Nepal; Zanskar is a subdistrict of the Kargil district, which lies in the eastern half of the Indian union territory of Ladakh. Indus River - the erosion at Nanga Parbat is causing rapid uplifting of lower crustal rocks; Mount ...
Glacial abrasion is the surface wear achieved by individual clasts, or rocks of various sizes, contained within ice or by subglacial sediment as the glacier slides over bedrock. [9] Abrasion can crush smaller grains or particles and remove grains or multigrain fragments, but the removal of larger fragments is classified as plucking (or ...
Flexural slip allows folding by creating layer-parallel slip between the layers of the folded strata, which, altogether, result in deformation. A good analogy is bending a phone book, where volume preservation is accommodated by slip between the pages of the book. The fold formed by the compression of competent rock beds is called "flexure fold".
Solidified lava flow in Hawaii Sedimentary layers in Badlands National Park, South Dakota Metamorphic rock, Nunavut, Canada. Geology (from Ancient Greek γῆ (gê) 'earth' and λoγία () 'study of, discourse') [1] [2] is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. [3]