the sevier and laramide orogenies ended when subduction along the western edge of north america was overcome by western extension of the north american plate to start the basin and range orogeny. the well known and familiar basin and range faults cut the older sevier thrust faults. the sevier orogeny was preceded by several other mountain-building events including the nevadan orogeny, the sonoman orogeny, and the antler orogeny, and partially overlapped in time and space with the laramide orogeny.