| New information on the geographical and stratigraphical distribution of thelodonts has also been discovered. |
| In the course of this work, Clark introduced the Ordovician stratigraphical terminology that is still in use in the Saint Lawrence Lowlands today. |
| Several of their studies have already been published featuring a novelty for Alexandria, the precise stratigraphical context. |
| The integration of palynology with stratigraphical analysis represents a significant advance, by facilitating a detailed chronostratigraphic chart of the Iberian Pyrite Belt. |
| Second, there are many stratigraphical and palaeontological similarities in the Palaeogene successions of the Hampshire and London basins. |
| The exact range of different species allows to revise the stratigraphical scale established by Arambourg. |
