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 construction will not be well understood. The shear zone dates to a minimum of 640 Ma (million years ago). Motion occurred along the zone in the course of the break-up of Gondwanaland within the Jurassic and buy Wood Ranger Power Shears Cretaceous durations. A few of the faults in the zone had been rejuvenated more than once before and through the opening of the South Atlantic within 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 throughout 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 alongside a lot of the size 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 slender 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 extend eastward solely to the Darfur region of western Sudan. It's now interpreted to increase into central and japanese Sudan, with a total length of 4,000 km. Within the Sudan, the shear zone could have acted as a structural barrier to improvement of deep Cretaceous-Tertiary sedimentary basins in the north of the realm. Objections to this idea are that the Bahr el Arab and Blue Nile rifts extend northwest past one proposed line for the shear zone. However, the alignment of the northwestern ends of the rifts in 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