Passage: The Western High Plateau lies along the Cameroon line, a series of volcanic swells running from the Atlantic Ocean in the southwestern part of the plateau to the Adamawa Plateau in the northeast. The region is characterised by accidented relief of massifs and mountains. The Western High Plateau features several dormant volcanoes, including the Bamboutos Mountains, Mount Oku and Mount Kupe. The plateau rises in steps from the west. To the east, it terminates in mountains that range from 1,000 metres to 2,500 metres in height, terminating in the South Cameroon Plateau. The plateau gives way to the Adamawa Plateau to the northeast, which is a larger but less accidented region.The core of the plateau is made up of volcanic rock, which is ringed by plutonic rock. The base is crystalline and metamorphic rock. The base rock is primarily gneiss and granite that dates to the Precambrian period. A layer of basalt covers this. Vulcanism has created fertile black and brown soils. Erosion played a large role.

Question: What does the Western High Plateau feature that is dormant?
volcanoes