Quartzite breccia, Rincon Mountains, Tucson, Arizona

Whereabouts

I collected this in ~1997 along the Martinez fault at the southeastern-most corner of the Rincon Mountains.  I like the fact that it comes in the form of a thin slab, almost like a piece of floor tile that you would find at a store.

Age & Formation
Cambrian Bolsa Quartzite formation, ~500 Ma.
QTVR