paibiantremadocianarenigordovician iiidarriwilianordovician vordovician vihirnantianllandovery wenlock ludlow pridolilochkovianpraghianemsianeifeliangivetianfrasnianfamennianearly mississippian middle mississippian late mississippian early pennsylvanian middle pennsylvanian late pennsylvanian asseliansakmarianartinskiankungurianroadianwordiancapitanianwuchiapingianchanghsingianinduanolenekiananisianladiniancarniannorianrhaetianhettangiansinemurianpliensbachiantoarcianaalenianbajocianbathoniancallovianoxfordiankimmeridgiantithonianberriasianvalanginianhauterivianbarremianaptianalbiancenomanianturonianconiaciansantoniancampanianmaastrichtianearly paleocene middle paleocene late paleocene early eocene middle eocene late eocene early oligocene late oligocene early miocene middle miocene late miocene early pliocene late pliocene early pleistocenemiddle pleistocenelate pleistocene---rhuddanianaeroniantelychiansheinwoodianhomeriangorstianludfordiantournaisianviseanserpukhovianbashkirianmoscoviankasimoviangzheliandanianselandianthanetianypresianlutetianbartonianpriabonianrupelianchattianaquitanianburdigalianlanghianserravalliantortonianmessinianzancleanpiacenziangelasianholocene