| original |
Ashgillian |
|
Canada(Anticosti Island) |
Achab,A. Chitinozoa from the Climacograptus prominens elongatus zone, Vaureal Formation (Upper Ordovician) Ile d'Anticosti,Quebec. |
1977 |
| details |
Late Ordovician |
|
Canada(Anticosti Island) |
Achab,A. Upper Ordovician chitinozoa: Vaureal and Ellis Bay Formations - Anticosti Island, Quebec. |
1978 |
| details |
Ashgillian |
|
Nd |
Achab,A. Chitinozoa from the Vaureal and Macasty Formations (Upper Ordovician), Ile d'Anticosti, Quebec, Canada. |
1978 |
| details |
Late Ashgillian |
|
North America |
Jenkins,W.A.M. et al. Stratigraphic ranges of selected chitinozoa. |
1979 |
| details |
Late Ordovician |
Early Gothlandian |
Canada(Anticosti Island) |
Achab,A. Biostratigraphy of the chitinozoa of Upper Ordovician - Lower Silurian of Anticosti Island. Preliminary results. |
1981 |
| details |
Middle Ashgillian |
|
Canada(Anticosti Island) |
Petryk,A. Lithostratigraphic, paleogeographic and hydrocarbon potential of Anticosti Island. |
1981 |
| details |
Middle Ashgillian |
|
Canada(Anticosti Island) |
Petryk,A. Lithostratigraphic, paleogeographic and hydrocarbon potential of Anticosti Island. |
1981 |
| details |
Late Ashgillian |
|
Canada(Quebec) |
Achab,A. Ordovician chitinozoan zonation of Quebec and Western Newfoundland. |
1989 |
| details |
Late Ashgillian |
|
Canada(Newfoundland) |
Achab,A. Ordovician chitinozoan zonation of Quebec and Western Newfoundland. |
1989 |