Because of its lack of vegetation and the long span of geologic time that is represented in this region, scientists from all over the world have used this area to formulate and test their geologic hyp...Because of its lack of vegetation and the long span of geologic time that is represented in this region, scientists from all over the world have used this area to formulate and test their geologic hypotheses. This region is bounded by the Nevada border on the east, the Garlock fault on the south and the Sierra Nevada Mountains on the west.