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 construction isn't properly understood. The shear zone dates to not less than 640 Ma (million years ago). Motion occurred along the zone through the break-up of Gondwanaland in the Jurassic and Cretaceous periods. Among the faults within the zone had been rejuvenated more than once before and in the course of 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 across the Adamawa uplift, a submit-Cretaeous formation. The Benue Trough lies to the north, and the Foumban Shear Zone to the south. Volcanic exercise has occurred along a lot 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 on this area is thinned in a relatively narrow belt, Wood Ranger Power Shears reviews 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, garden cutting tool 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 Wood Ranger Power Shears order now interpreted to increase into central and jap Sudan, buy Wood Ranger Power Shears with a total length of 4,000 km. Within the Sudan, the shear zone could have acted as a structural barrier to growth 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, 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