formation of basin and range mountains is a result of
As a result of this extension, the average crustal thickness of the Basin and Range region is 30 - 35 kilometers (19 - 22 miles), compared with a worldwide average of around 40 kilometers (25 miles).asin and Range topography is characterized by alternating valleys and mountainous areas, oriented in a north-south, linear direction. The entire region, including all of Nevada, southeastern California, and southeastern Oregon, consists of high mountain ranges (mostly running north-south) alternating with low valleys.