upper Tertiary  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Tertiary
 ....upper Tertiary
NTPoznan Clays
RTNeogene
 Akchagylian
 lower Tertiary
 Gauss Chron
 Gilbert Chron
 Matuyama Chron
 middle Tertiary