The following thin sections come from the western portion of the San Gabriel fault along two transects perpendicular to the fault surface. Slip is concentrated within a 4 - 7 cm wide gouge zone at the point where both transects intersect the fault. The two transects are about 100 m apart along fault strike. This page includes characteristic images of the thin sections taken at two different scales (see scale bars). Click on an image to view a full size version. 1 mm scale images are taken under crossed polarizers and the 0.2 mm scale images are taken under polarized light.
Transect 8B-1 Transect 8E-1

8B-1 Josephine Granodiorite 1 - 15 cm from fault
8E-1 Josephine Granodiorite 1 - 15 cm from fault
8B-3 Mendenhall Gneiss 0 - 4 cm from fault
8B-6 Josephine Granodiorite 30 - 45 cm from fault
8B-5 Josephine Granodiorite 8 - 10 m from fault
8B-2 Josephine Granodiorite 67 m from fault