Mentor Beds  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Lower Cretaceous
 .....Mentor Beds
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Comanchean
 .....Mentor Beds
RTKansas
SNMentor Sandstone Member (or Belvedere Formation), Lower Cretaceous. In central Kansas. This term has multiple hierarchies.