from 310 million to 280 million years ago; warm climate; swampy land
[ Syn: pennsylvanian , pennsylvanian period , upper carboniferous , upper carboniferous period ]
a native or resident of Pennsylvania
[ Syn: pennsylvanian , keystone stater ]
from 310 million to 280 million years ago; warm climate; swampy land
[ Syn: pennsylvanian , pennsylvanian period , upper carboniferous , upper carboniferous period ]
a native or resident of Pennsylvania
[ Syn: pennsylvanian , keystone stater ]