Aulacogens

5th longest river of India

plain in Europe

large inlet in South Australia

bay in South Astralia

An aulacogen is a failed arm of a triple junction. Aulacogens are a part of plate tectonics where oceanic and continental crust is continuously being created, destroyed, and rearranged on the Earth’s surface. Rift zones are places where new crust is formed. An aulacogen is a rift zone that is no longer active.

geologically defined area of relatively low-lying land in southern Scotland

mountain range in Oklahoma, United States

geologic area located around the Norwegian capital Oslo

major seismic zone and a prolific source of intraplate earthquakes in the southern and midwestern United States

rift basin in South Sudan

rift valley extending from near Montréal through Ottawa in Canada