「Central African Shear Zone」を編集中

<br>The Central African Shear Zone (CASZ) (or Shear System) is a wrench fault system extending in an ENE course from the Gulf of Guinea by Cameroon into Sudan. The structure shouldn't be nicely understood. The shear zone dates to a minimum of 640 Ma (million years in the past). Motion occurred along the zone during the break-up of Gondwanaland within the Jurassic and Cretaceous intervals. A number of the faults in the zone had been rejuvenated greater than once before 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 post-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 length of the Cameroon line from 130 Ma to the present, and may be associated to re-activation of the CASZ.<br><br><br><br>The lithosphere beneath the CASZ in this area is thinned in a relatively slender belt, with the asthenosphere upwelling from a depth of about 190 km to about one hundred twenty km. The Mesozoic and Tertiary movements have produced elongated rift basins in central Cameroon, northern Central African Republic and southern Chad. The CASZ was formerly thought to increase eastward solely to the Darfur region of western Sudan. It's now interpreted to extend into central and japanese Sudan, with a total length of 4,000 km. In the Sudan,  [https://imoodle.win/wiki/Comprehensive_Study_Report_On_Wood_Ranger_Power_Shears_And_Garden_Pruning_Tools Wood Ranger Power Shears shop] the shear zone may have acted as a structural barrier to growth of deep Cretaceous-Tertiary sedimentary basins in the north of the world. Objections to this theory are that the Bahr el Arab and Blue Nile rifts lengthen northwest past 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.<br><br><br><br>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, C.; Dorbath, L.; Fairhead,  Wood Ranger Power Shears features J. D.; Stuart, G. W. (1986). "A teleseismic delay time examine across the Central African Shear Zone within the Adamawa region 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,  [http://www.onestopclean.kr/bbs/board.php?bo_table=free&wr_id=545993 Wood Ranger Power Shears warranty] 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 throughout the South Atlantic Region. Plomerova, J; Babuska, V; Dorbath, C.; Dorbath, L.; Lillie, R. J. (1993). "Deep lithospheric structure across the Central African Shear Zone in Cameroon". Geophysical Journal International. A hundred and fifteen (2): 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, financial geology, geohazards, geosites and geoscientific schooling of every nation. シュプリンガー・ジャパン株式会社.<br><br><br><br>Viscosity is a measure of a fluid's fee-dependent resistance to a change in form or  [https://wiki.giroudmathias.ch/index.php?title=Utilisateur:RosalineHarp23 Wood Ranger Power Shears warranty] to motion of its neighboring portions relative to one another. For liquids, it corresponds to the informal idea of thickness; for instance, syrup has a better viscosity than water. Viscosity is outlined scientifically as a pressure multiplied by a time divided by an space. Thus its SI models are newton-seconds per metre squared, or pascal-seconds. Viscosity quantifies the internal frictional force between adjacent layers of fluid which can be in relative movement. For instance, when a viscous fluid is pressured via a tube, it flows more quickly close to the tube's heart line than close to its partitions. Experiments show that some stress (resembling a strain difference between the 2 ends of the tube) is required to maintain the stream. It is because a pressure is required to beat the friction between the layers of the fluid which are in relative motion. For a tube with a constant rate of move, the energy of the compensating pressure is proportional to the fluid's viscosity.<br><br><br><br>Usually, viscosity depends upon a fluid's state, comparable to its temperature, pressure, and charge of deformation. However, the dependence on some of these properties is negligible in certain cases. For example, the viscosity of a Newtonian fluid doesn't vary considerably with the speed of deformation. Zero viscosity (no resistance to shear stress) is observed solely at very low temperatures in superfluids; in any other case, the second law of thermodynamics requires all fluids to have constructive viscosity. A fluid that has zero viscosity (non-viscous) is named supreme or inviscid. 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