| First Author |
Year |
Title |
Link |
Action |
| Gutiérrez-Marco, J. C. et al. |
1999 |
A biostratigraphical review of the Middle Ordovician shales from NW S… |
https://www.zotero.… |
|
| Mitchell, C. E. et al. |
1998 |
A diverse Da2 fauna preserved within an altered volcanic ash fall, Ea… |
https://www.zotero.… |
|
| Colmenar, J. et al. |
2013 |
A draboviid brachiopod association from the Upper Ordovician of Portu… |
https://www.zotero.… |
|
| Harland, W. B. |
1990 |
A Geologic Time Scale 1989 |
None |
|
| Vai, G. B. |
2007 |
A history of chronostratigraphy |
https://www.researc… |
|
| Blodgett, R. B. et al. |
1987 |
A late Ordovician age reappraisal for the Upper Fossil Creek Volcanic… |
https://www.zotero.… |
|
| Bolton, T. E. & Nowlan, G. S. |
1979 |
A Late Ordovician fossil assemblage from an outlier north of Aberdeen… |
https://www.zotero.… |
|
| Charles Lyell |
1855 |
A manual of elementary geology |
https://www.biodive… |
|
| Mitchell, C. et al. |
2008 |
A mixed isograptid-didymograptid graptolites assemblage from the Midd… |
https://www.zotero.… |
|
| Serpagli, E. et al. |
2007 |
A new early Ordovician Conodont Genus from the Southern Montagne Noir… |
https://www.zotero.… |
|