Early Pennsylvanian Epoch ペンシルベニア州南部 Pennsylvanian Sub-period younger bound -315.2 +|-0.2 Ma Moscovian Age Geologic Time Scale (2020) Phanerozoic Eon Paleozoic Era 降低宾夕法尼亚州 早宾夕法尼亚世 Carboniferous Period Early Pennsylvanian Bashkirian Age 前期ペンシルバニア紀 Lower Pennsylvanian older bound -323.2 +|-0.4 Ma Base of Middle Pennsylvanian Mississippian Sub-period Middle Pennsylvanian Epoch Serpukhovian Age Base of Pennsylvanian x1.1.3.2.1.3