All I can say is WOW! the geology is mesmerizing. I was surprised I couldn't find more on the geology along this road. But I did find this: https://pubs.usgs.gov/bul/1710c/report.pdf page 14 The study area is underlain by two groups of crystalline rocks that are generally exposed only in canyons that have cut through overlying sedimentary rocks. The older group is Proterozoic gneiss and migmatite that was intruded by Proterozoic anorthosite, felsic dikes, and related rocks. This gneiss-anorthosite complex structurally overlies the younger basement rock group, the Orocopia Schist, a deformed thick sequence of greenschist facies metasedimentary rock and minor metavolcanic rock of probable Late Cretaceous age.

For more from this part of the Scenic Drive: [ youtube video ]

The Painted Canyon (FYI there is a hike there) fault is 1 mi southwest of the Platform fault. Between the Platform and the Painted Canyon faults the Mecca and Palm Springs Formations were deformed into a series of anticlines and synclines. One mile southwest of the Painted Canyon fault is the Skeleton Canyon fault, which is part of the San Andreas fault zone.