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 just not effectively understood. The shear zone dates to not less than 640 Ma (million years ago). Motion occurred alongside the zone throughout the break-up of Gondwanaland within the Jurassic and Cretaceous durations. Among the faults within the zone had been rejuvenated greater than once before and Wood Ranger Tools throughout 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 put up-Cretaeous formation. The Benue Trough lies to the north, and the Foumban Shear Zone to the south. Volcanic activity has occurred along many of the size of the Cameroon line from 130 Ma to the present, and may be associated to re-activation of the CASZ.

The lithosphere beneath the CASZ in this area is thinned in a relatively slim belt, with the asthenosphere upwelling from a depth of about 190 km to about a hundred and 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 only to the Darfur area of western Sudan. It's now interpreted to extend into central and jap Sudan, with a total length of 4,000 km. Within the Sudan, the shear zone may have acted as a structural barrier to development of deep Cretaceous-Tertiary sedimentary basins in the north of the world. Objections to this concept are that the Bahr el Arab and 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 idea. Ibrahim, Ebinger & Fairhead 1996, electric Wood Ranger Power Shears sale shears 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