| details |
Mississippian |
|
USA |
Wilson,L.R. The use of fossil spores in the resolution of Mississippian stratigraphic problems. |
1959 |
| details |
Nd |
|
Nd |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 1 |
1956 |
| details |
Late Chesterian |
|
North America |
Hoffmeister,W.S. et al. Geologic range of Paleozoic plant spores in North America |
1955 |
| details |
Recent |
|
Nd |
Potonie,R. Position of the Paleozoic spore genera in the natural system. |
1954 |
| details |
Late Carboniferous |
|
W.Germany(N.Rhine) |
Potonie,R. et al. The genera of Paleozoic sporae dispersae and their stratigraphy. |
1954 |
| original |
Chesterian |
Springerian |
Utah |
Schemel,M.P. Carboniferous plant spores from Daggett County, Utah |
1950 |