| details |
Late Pennsylvanian |
|
Pennsylvania |
Cross,A.T. The geology of the Pittsburgh Coal: Stratigraphy, petrology, origin and composition, and geologic interpretation of mining problems. |
1952 |
| details |
Late Pennsylvanian |
|
West Virginia |
Cross,A.T. The geology of the Pittsburgh Coal: Stratigraphy, petrology, origin and composition, and geologic interpretation of mining problems. |
1952 |
| details |
Late Pennsylvanian |
|
Ohio |
Cross,A.T. The geology of the Pittsburgh Coal: Stratigraphy, petrology, origin and composition, and geologic interpretation of mining problems. |
1952 |
| details |
Nd |
|
Nd |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |
| details |
Paleozoic |
|
Scotland |
Arnold,C.A. An Introduction to Paleobotany. |
1947 |
| details |
Paleozoic |
|
Poland |
Arnold,C.A. An Introduction to Paleobotany. |
1947 |
| details |
Paleozoic |
|
W.Germany |
Arnold,C.A. An Introduction to Paleobotany. |
1947 |
| details |
Paleozoic |
|
Illinois |
Arnold,C.A. An Introduction to Paleobotany. |
1947 |