Gravisporites densus
- Citations total:
- 2
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| original | Allegheny | Pennsylvania | Habib,D. Distribution of spore and pollen assemblages in the Lower Kittanning Coal of Western Pennsylvania | 1966 | |
| details | Middle Pennsylvanian | West Virginia | Kosanke,R.M. Palynology of selected Coal Beds in the proposed Pennsylvanian system stratotype in West Virginia | 1984 |