Chad  search
BTAfrica
 .West Africa
 ..Chad
NTKanem Chad
UFChad Republic
RTSahara
 Sahel
 Chad Basin
 Lake Chad
 Logone River
 Tibesti Massif
Chad Basin  search
BTAfrica
 .Chad Basin
RTCameroon
 Nigeria
 Niger
 Lake Chad
 Chad
SNIndexed with countries as applicable.
Chad Republic  search
USEChad
Chadak Uzbekistan  search
BTAsia
 .Uzbekistan
 ..Chadak Uzbekistan
SNVillage in E Uzbekistan. This term has multiple hierarchies.
Chadobets Uplift  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Chadobets Uplift
BTAsia
 .Chadobets Uplift
RTKrasnoyarsk Russian Federation
SNSE Krasnoyarsk Kray in S Siberia. This term has multiple hierarchies.
Chadron Arch  search
BTUnited States
 .Chadron Arch
RTNebraska
 South Dakota
SNNW Nebraska and SW South Dakota. Indexed with states as applicable.
Chadron Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Chadron Formation
RTWyoming
 Colorado
 Nebraska
 South Dakota
 White River Group
 upper Eocene
 lower Oligocene
 Chadronian
SNUpper Eocene to lower Oligocene. In White River Group. NE Colorado, W Nebraska, W South Dakota, and E Wyoming. Age was previously considered lower Oligocene. Indexed with upper Eocene and/or lower Oligocene as applicable.
Chadronian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....upper Eocene
 ......Chadronian
RTChadron Formation
SNNorth America. Upper Eocene. Age previously considered lower Oligocene.