K-T boundary  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....K-T boundary
BTstratigraphic boundary
 .K-T boundary
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Paleocene
 .....lower Paleocene
 ......K-T boundary
UFCretaceous-Tertiary boundary
 K/T boundary
RTbiostratigraphy
 Arroyo El Mimbral
 Bauru Formation
 Beaverhead Formation
 Fort Union Formation
 Difunta Group
 Mardin Formation
 Muro Group
 Paskapoo Formation
 Deccan Traps
 Denver Formation
 El Kef Tunisia
 Mount Scopus Group
 Nanaimo Group
 North Horn Formation
 Rat
SNBefore 1993, also search Cretaceous-Tertiary; (Cretaceous AND Tertiary AND (boundary or stratigraphic boundary)). This term has multiple hierarchies. Added to Thesaurus in 1993.