Purisima Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Purisima Formation
RTPliocene
 Miocene
 California
 San Gregorio Formation
SNMiocene-Pliocene. W California. Indexed with age as applicable. Added to Thesaurus in 1989.