Wolfcampian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Lower Permian
 .....Wolfcampian
NTHueco Limestone
UFWolfcamp Formation
 Wolfcamp Series
RTAbo Formation
 New Mexico
 Texas
 Roca Formation
SNProvincial series, North America. Above Virgilian (Pennsylvanian), below Leonardian.