aquitaniano Aquitan Aquitan a1.1.1.2.2.6 阿启坦期 Miocene Epoch Chattian Age アキタニアン期 Paleogene Period Aquitaniën-Vierland Base of Neogene Neogene Period younger bound -20.44 Ma Akwitan aquitaniai Aquitaniano Aquitaninse Burdigalian Age Phanerozoic Eon older bound -23.03 Ma Aquitanian akvitán пквитан Aquitanium Aquitanium Aquitanian Age Aquitani Aquitanien Base of Burdigalian Aquitanien Oligocene Epoch International Chronostratigraphic Chart (2017) Cenozoic Era akvitanij Akvitanis aquitan