Schist (fault gouge)

Schist fault gauge

Schist (fault gouge)

This sample of schist display intense fracturing and re-healing (annealing) from being subjected to shearing motion along a fault zone. This sample is from a San Benito River gravel bar (near the San Andreas and Calaveras fault zones) near Hollister, San Benito County, California.
https://gotbooks.miracosta.edu/rocks/metamorphic/18.html 2/2/2021