 
<translate> Kwarin rift wani yanki ne mai siffa mai siffa tsakanin tsaunuka da yawa ko tsaunukan tsaunuka da aka kirkira ta hanyar aikin geologic rift ko kuskure. An kafa kwarin rift a kan iyakar farantin da ya bambanta, fadada crustal, yaduwar farfajiyar, wanda daga baya ya kara zurfafawa ta hanyar karfin lalata. Sa'ad da ƙarfin ƙarfin ya isa ya sa farantin ya rabu, wani ɓangaren tsakiya ya faɗi tsakanin sassan biyu a gefuna, yana samar da wani abu. Faduwar cibiyar tana haifar da kusan bangon bangon bangon bangon bangon bangon lokacin da yake sabo. Wannan fasalin shi ne farkon kwarin, amma yayin da aikin ya ci gaba, kwarin ya faɗaɗa, har sai ya zama babban kwari wanda ya cika da tarkace daga bangon rami da kewaye. Daya daga cikin sanannun misalai na wannan tsari shine Gabashin Afirka Rift. A Duniya, ɓarna na iya faruwa a kowane tsawo, daga kasan teku zuwa filayen da tsaunukan tsaunuka a cikin ɓawon burodi ko a cikin ɓawon teku. Sau da yawa suna da alaƙa da wasu ƙananan ƙauyuka ko ƙauyuka masu tsawo, waɗanda galibi ana ɗaukarsu ɓangare na babban kwarin rift geologically.  Rift kwari ne hujja na abin da irin farantin iyaka? Bari mu sami wasu rafi na sani na farko. <eng> A rift valley is a linear-shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fault. A rift valley is formed on a divergent plate boundary, a crustal extension, a spreading apart of the surface, which is subsequently further deepened by the forces of erosion. When the tensional forces were strong enough to cause the plate to split apart, a center block dropped between the two blocks at its flanks, forming a graben. The drop of the center creates the nearly parallel steeply dipping walls of a rift valley when it is new. That feature is the beginning of the rift valley, but as the process continues, the valley widens, until it becomes a large basin that fills with sediment from the rift walls and the surrounding area. One of the best known examples of this process is the East African Rift. On Earth, rifts can occur at all elevations, from the sea floor to plateaus and mountain ranges in continental crust or in oceanic crust. They are often associated with a number of adjoining subsidiary or co-extensive valleys, which are typically considered part of the principal rift valley geologically.

A rift valley is evidence of which kind of plate boundary? Let's have some stream of consciousness first. 