Central African Shear Zone

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Revision as of 13:08, 17 September 2025 by Kareem6317 (talk | contribs) (Created page with "<br>The Central African Shear Zone (CASZ) (or Shear System) is a wrench fault system extending in an ENE path from the Gulf of Guinea by way of Cameroon into Sudan. The structure shouldn't be effectively understood. The shear zone dates to at the least 640 Ma (million years ago). Motion occurred along the zone in the course of the break-up of Gondwanaland within the Jurassic and [http://www.dwise.co.kr/bbs/board.php?bo_table=free&wr_id=537607 Wood Ranger Power Shears we...")
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The Central African Shear Zone (CASZ) (or Shear System) is a wrench fault system extending in an ENE path from the Gulf of Guinea by way of Cameroon into Sudan. The structure shouldn't be effectively understood. The shear zone dates to at the least 640 Ma (million years ago). Motion occurred along the zone in the course of the break-up of Gondwanaland within the Jurassic and Wood Ranger Power Shears website Cretaceous durations. Among the faults in the zone were rejuvenated more than once earlier than and during the opening of the South Atlantic within the Cretaceous interval. It has been proposed that the Pernambuco fault in Brazil is a continuation of the shear zone to the west. In Cameroon, the CASZ cuts throughout the Adamawa uplift, a publish-Cretaeous formation. The Benue Trough lies to the north, and the Foumban Shear Zone to the south. Volcanic exercise has occurred alongside a lot of the size of the Cameroon line from 130 Ma to the present, and could also be associated to re-activation of the CASZ.



The lithosphere beneath the CASZ on this space is thinned in a comparatively slender belt, with the asthenosphere upwelling from a depth of about 190 km to about 120 km. The Mesozoic and Tertiary movements have produced elongated rift basins in central Cameroon, northern Central African Republic and southern Chad. The CASZ was previously thought to increase eastward solely to the Darfur area of western Sudan. It's now interpreted to increase into central and eastern Sudan, with a total size of 4,000 km. In the Sudan, the shear zone could have acted as a structural barrier to improvement of deep Cretaceous-Tertiary sedimentary basins within the north of the area. Objections to this theory are that the Bahr el Arab and Blue Nile rifts prolong northwest beyond one proposed line for the shear zone. However, the alignment of the northwestern ends of the rifts on this areas helps the idea. Ibrahim, Ebinger & Fairhead 1996, pp.



Dorbath et al. 1986, pp. Schlüter & Trauth 2008, pp. Foulger & Jurdy 2007, pp. Plomerova et al. 1993, pp. Bowen & Jux 1987, pp. Bowen, Robert; Jux, Ulrich (1987). Afro-Arabian geology: a kinematic view. Dorbath, Wood Ranger Power Shears shop C.; Dorbath, L.; Fairhead, J. D.; Stuart, G. W. (1986). "A teleseismic delay time research throughout the Central African Shear Zone in the Adamawa area of Cameroon, West Africa". Foulger, Gillian R.; Jurdy, Donna M. (2007). Plates, plumes, and planetary processes. Geological Society of America. Ibrahim, A. E.; Ebinger, C. J.; Fairhead, J. D. (20 April 1996). "Lithospheric extension northwest of the Central African Shear Zone in Sudan from potential discipline studies". Pankhurst, Robert J. (2008). West Gondwana: pre-Cenozoic correlations across the South Atlantic Region. Plomerova, J; Babuska, V; Dorbath, C.; Dorbath, L.; Lillie, R. J. (1993). "Deep lithospheric construction across the Central African Shear Zone in Cameroon". Geophysical Journal International. 115 (2): Wood Ranger Power Shears website 381-390. Bibcode:1993GeoJI.115..381P. Selley, Richard C. (1997). African basins. Schlüter, Thomas; Trauth, Martin H. (2008). Geological atlas of Africa: with notes on stratigraphy, tectonics, economic geology, geohazards, geosites and geoscientific training of each nation. シュプリンガー・ジャパン株式会社.



Viscosity is a measure of a fluid's rate-dependent resistance to a change in shape or to motion of its neighboring portions relative to one another. For liquids, it corresponds to the informal concept of thickness; for Wood Ranger Power Shears website instance, syrup has a better viscosity than water. Viscosity is outlined scientifically as a pressure multiplied by a time divided by an area. Thus its SI units are newton-seconds per metre squared, or pascal-seconds. Viscosity quantifies the internal frictional Wood Ranger Power Shears website between adjoining layers of fluid which are in relative motion. For example, when a viscous fluid is compelled by means of a tube, it flows extra rapidly near the tube's center line than near its partitions. Experiments present that some stress (resembling a pressure difference between the 2 ends of the tube) is required to sustain the movement. It is because a pressure is required to overcome the friction between the layers of the fluid which are in relative movement. For a tube with a continuing fee of circulation, Wood Ranger brand shears the energy of the compensating pressure is proportional to the fluid's viscosity.



On the whole, viscosity is dependent upon a fluid's state, corresponding to its temperature, strain, and charge of deformation. However, the dependence on some of these properties is negligible in certain circumstances. For example, the viscosity of a Newtonian fluid doesn't vary significantly with the rate of deformation. Zero viscosity (no resistance to shear stress) is noticed solely at very low temperatures in superfluids; otherwise, the second law of thermodynamics requires all fluids to have optimistic viscosity. A fluid that has zero viscosity (non-viscous) is known as splendid or inviscid. For non-Newtonian fluids' viscosity, there are pseudoplastic, plastic, and dilatant flows which can be time-independent, and there are thixotropic and rheopectic flows that are time-dependent. The phrase "viscosity" is derived from the Latin viscum ("mistletoe"). Viscum additionally referred to a viscous glue derived from mistletoe berries. In supplies science and engineering, there is commonly curiosity in understanding the forces or stresses concerned in the deformation of a material.