The San Andreas Fault by R. Willis in 1925

 

Today I choose to post a fine 3D view of the Gabilan Range, SE of San Francisco, as it was sketched by Robin Willis in 1925. The San Andreas Fault bounds that range to the NE.

Below is a modern Google Earth view of the same area, with in grey stripes of high resolution LIDAR topography (from opentopography.org) along the San Andreas Fault trace.

The following view illustrates how LIDAR may now display fault morphology and geomorphic offsets (see the right-laterally offset terrace in the middle of the image) with very high accuracy. The illustrated section is from a swath of LIDAR data along the Gabilan range (see above).