Geology please help?
The geologists have proved that the faulting began almost immediately after the granite formed and continues today. Assuming that the plates moved at a constant rate for the past 50 million years, what is the approximate rate of offset?
a. 6.2 km/Myr = 62 mm/yr
b. 6.2 km/Myr = 6.2 mm/yr
c. 22 km/Myr = 2.1 mm/yr
d. 22 km/Myr = 21 mm/yr