middle Eocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....middle Eocene
NTAycross Formation
 Carrizo Sand
 Claiborne Group
 Cockfield Formation
 Cook Mountain Formation
 Laney Shale Member
 Lisbon Formation
 Queen City Formation
 Santee Limestone
 Sparta Sand
 Tallahatta Formation
 Tyee Formation
 Ulatisian
 Yegua Formation
RTlower Eocene
 upper Eocene
 Cozy Dell Formation
 Narizian