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The Central African Shear Zone (CASZ) (or Shear System) is a wrench fault system extending in an ENE route from the Gulf of Guinea by means of Cameroon into Sudan. The structure is not effectively understood. The shear zone dates to at least 640 Ma (million years in the past). Motion occurred alongside the zone throughout the break-up of Gondwanaland within the Jurassic and Wood Ranger Power Shears specs Cretaceous intervals. Some of the faults within the zone have been rejuvenated more than once earlier than and Wood Ranger Power Shears website through the opening of the South Atlantic in the Cretaceous period. 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 across 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 along most of the length of the Cameroon line from 130 Ma to the present, and could also be related to re-activation of the CASZ.

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 120 km. The Mesozoic and Tertiary movements have produced elongated rift basins in central Cameroon, northern Central African Republic and Wood Ranger Power Shears website southern Chad. The CASZ was formerly thought to extend eastward solely to the Darfur area of western Sudan. It is now interpreted to extend into central and jap Sudan, with a complete length of 4,000 km. Within the Sudan, the shear zone might 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 Wood Ranger Power Shears website Blue Nile rifts lengthen northwest beyond one proposed line for the shear zone. However, the alignment of the northwestern ends of the rifts on this areas helps the theory. 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, L.; Fairhead, J. D.; Stuart, G. W. (1986). "A teleseismic delay time research throughout 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, Wood Ranger Power Shears website J. D. (20 April 1996). "Lithospheric extension northwest of the Central African Shear Zone in Sudan from potential area studies". Pankhurst, Robert J. (2008). West Gondwana: pre-Cenozoic correlations across the South Atlantic Region. Plomerova, J; Babuska, Wood Ranger Power Shears website V; Dorbath, C.; Dorbath, L.; Lillie, R. J. (1993). "Deep lithospheric structure 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, geosites and geoscientific schooling of every nation. シュプリンガー・ジャパン株式会社.

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