As much as 20% of the relative motion between the Pacific and North American Plates may be accommodated by the extensional stretching of the Basin and Range province, leaving numerous north-south-oriented mountain ranges separated by down-dropped, sediment-filled basins. True / False.

False

Explanation:

According to the relative motion of the plates, the relative motion between the Pacific and the North American plates may be formed by the external stretching of the basin and range provinces that leaves the north and the south orientation of the mountain ranges that are separated by the down-dropped sediments filed basin.