original |
Middle Devonian |
Early Mississippian |
Ohio |
Winslow,M.R. Plant spores and other microfossils from Upper Devonian and Lower Mississippian rocks of Ohio |
1962 |
original |
Late Devonian |
Early Mississippian |
Ohio |
Eames,L.E. Palynology of the Berea Sandstone and Cuyahoga Group of northeastern Ohio. |
1974 |
original |
Strunian |
Early Tournaisian |
Canada(Saskatchewan) |
Playford,G. et al. Miospores and organic-walled microphytoplankton of Devonian-Carboniferous boundary beds, (Bakken Formation), southern Saskatchewan: A systematic and stratigraphic appraisal. |
1993 |