a1.1.2.2.2.2 Bathoniense older bound -168.3 +|-1.3 Ma 巴通期 Base of Bathonian Bathonien Bathonien Middle Jurassic Epoch Mesozoic Era bathonij bathoniano Bathoni Bathonium バソニアン期 Geologic Time Scale (2018) bathon Бат Phanerozoic Eon Bathon Bathon Bathon Batonis Bathonian Bathonian Age Jurassic Period Barthoniën Baton bath bath Batoniano Base of Callovian younger bound -166.1 +|-1.2 Ma Callovian Age Bajocian Age