details |
Desmoinesian |
|
Indiana |
Guennel,G.K. Fossil spores of the Alleghenian Coals in Indiana |
1952 |
details |
Cretaceous |
|
Nd |
Cross,A.T. Plant microfossils and the application of their study to Coal stratigraphy. |
1950 |
details |
Paleozoic |
|
Nd |
Knox,E.M. The spores of Lycopodium, Phylloglossum, Selaginella and Isoetes and their value in the study of microfossils of Paleozoic age. |
1950 |
details |
Morrowan |
Desmoinesian |
Illinois |
Kosanke,R.M. Plant microfossils in correlation of Coal Beds. |
1947 |
details |
Desmoinesian |
|
Illinois |
Kosanke,R.M. Plant microfossils in correlation of Coal Beds. |
1947 |
details |
Desmoinesian |
Virgilian |
Illinois |
Kosanke,R.M. Plant microfossils in correlation of Coal Beds. |
1947 |
original |
Desmoinesian |
|
Iowa |
Schopf,J.M. et al. An annotated synopsis of Paleozoic fossil spores and the definition of generic groups. |
1944 |
details |
Carboniferous |
|
Nd |
Wilson,L.R. Spores and pollen as microfossils. |
1944 |