Rancholabrean  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Upper Pleistocene
 ......Rancholabrean
SNNorth American continental stage. Above Irvingtonian, below Holocene. Added to Thesaurus in 1989.