San Onofre Breccia  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....middle Miocene
 ......San Onofre Breccia
RTCalifornia
SNUnderlies Monterey Formation; overlies Cozy Dell Formation. San Diego County in S California.