Paleogene
Related Words
paleoceneeoceneoligocenecenozoicmesozoiccretaceousepochperioderageologystratigraphysedimentfossilmammalevolutionextinctionbiodiversityungulatecetaceanfaunafloraclimatewarmingcoolingtectonicscontinentdriftplatelithospherestratumrockshalelimestonesandstonechronologymillionyearprehistorypaleontologygeochronologyboundarytransitionradiationspeciationadaptationancestorlineagephylogenytaxonomygenusspeciesbiomeecosystemenvironmentatmosphereoceanglaciationinterglacialdepositionerosionmineralisotopecarbonoxygendatingradiometricgeologic time scale