Permo-Carboniferous


Permo-Carboniferous

[¦pər·mō‚kär·bə′nif·ə·rəs] (geology) The Permian and Carboniferous periods considered as one unit. The Permian and Pennsylvanian periods considered as a single unit. The rock unit, or the period of geologic time, transitional between the Upper Pennsylvanian and the Lower Permian periods.