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 means of Cameroon into Sudan. The structure is not properly understood. The shear zone dates to at least 640 Ma (million years ago). Motion occurred alongside the zone in the course of the break-up of Gondwanaland within the Jurassic and Cretaceous intervals. Some of the faults in the zone had been rejuvenated greater than once earlier than and during the opening of the South Atlantic in 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, branch cutting shears a post-Cretaeous formation. The Benue Trough lies to the north, branch cutting shears and the Foumban Shear Zone to the south. Volcanic activity has occurred alongside most of the length of the Cameroon line from 130 Ma to the current, and could also be associated to re-activation of the CASZ.

The lithosphere beneath the CASZ in this area is thinned in a relatively narrow 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 previously thought to extend eastward solely to the Darfur area of western Sudan. It is now interpreted to extend into central and eastern Sudan, with a complete length of 4,000 km. In the Sudan, the shear zone may have acted as a structural barrier to improvement of deep Cretaceous-Tertiary sedimentary basins within the north of the area. Objections to this principle are that the Bahr el Arab and Blue Nile rifts prolong northwest beyond one proposed line for the shear zone. However, branch cutting shears the alignment of the northwestern ends of the rifts on this areas supports 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, C.; Dorbath, Wood Ranger Power Shears warranty buy Wood Ranger Power Shears Wood Ranger Power Shears Shears features L.; Fairhead, J. D.; Stuart, G. W. (1986). "A teleseismic delay time examine 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 field 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 construction throughout the Central African Shear Zone in Cameroon". Geophysical Journal International. 115 (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, economic geology, geohazards, branch cutting shears geosites and geoscientific training of every country. シュプリンガー・ジャパン株式会社.

Viscosity is a measure of a fluid's charge-dependent resistance to a change in form or to motion of its neighboring portions relative to one another. For liquids, it corresponds to the informal concept of thickness; for example, syrup has a better viscosity than water. Viscosity is defined scientifically as a drive multiplied by a time divided by an space. Thus its SI models are newton-seconds per metre squared, or pascal-seconds. Viscosity quantifies the inner frictional Wood Ranger Power Shears sale between adjoining layers of fluid that are in relative motion. As an illustration, when a viscous fluid is pressured by means of a tube, it flows more rapidly close to the tube's center line than near its walls. Experiments present that some stress (reminiscent of a stress difference between the two ends of the tube) is required to maintain the movement. It's because a force is required to overcome the friction between the layers of the fluid which are in relative motion. For a tube with a constant charge of movement, the strength of the compensating pressure is proportional to the fluid's viscosity.

Generally, viscosity depends upon a fluid's state, reminiscent of its temperature, strain, and charge of deformation. However, the dependence on a few of these properties is negligible in sure instances. For instance, the viscosity of a Newtonian fluid doesn't fluctuate considerably with the speed of deformation. Zero viscosity (no resistance to shear stress) is noticed only at very low temperatures in superfluids; in any other case, cordless Wood Ranger Power Shears USA shears the second law of thermodynamics requires all fluids to have optimistic viscosity. A fluid that has zero viscosity (non-viscous) is called supreme or inviscid. For non-Newtonian fluids' viscosity, there are pseudoplastic, plastic, and dilatant flows which can be time-impartial, branch cutting shears 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 materials science and engineering, branch cutting shears there is often interest in understanding the forces or stresses concerned within the deformation of a material.