Korosenseis

Korosenseis is a term used in the field of geology to describe a type of faulting where the hanging wall moves downward relative to the footwall. This movement is typically associated with extensional tectonic regimes, where the crust is being pulled apart. Korosenseis faults are characterized by their steep dips, often exceeding 60 degrees, and are commonly found in areas of active rifting or spreading, such as the East African Rift or the Basin and Range Province in the western United States.

The term "korosenseis" is derived from Greek, with "koros" meaning "down" and "seismos" meaning "earthquake." This reflects the downward movement of the hanging wall during faulting. Korosenseis faults can produce significant vertical displacement, leading to the formation of grabens and horsts, which are characteristic features of extensional tectonic environments.

These faults can also be associated with significant seismic activity, as the release of accumulated stress along the fault plane can generate earthquakes. The study of korosenseis faults is important for understanding the tectonic processes that shape the Earth's crust and for assessing seismic hazards in regions prone to extensional faulting.