| Marnes d’Auzas Formation | |
|---|---|
| Stratigraphic range: Late Cretaceous (Late Maastrichtian) ~ | |
| Type | Geological formation |
| Underlies | Aurignac Formation |
| Overlies | Jadet Calcarenites Formation |
| Thickness | About 100 m |
| Lithology | |
| Primary | Marls |
| Other | Sandstones |
| Location | |
| Coordinates | 43°25′N 1°30′E |
| Region | Europe |
| Country |  France |
  Marnes d'Auzas Formation (France) | |
The Marnes d’Auzas Formation (Auzas Marls Formation) is a geological Formation in southwestern France (departments of Ariège and Haute-Garonne) whose strata date back to the Late Maastrichtian.[1] It is about 100 metres thick and consists primarily of marls with some interbeds of sandstones.[1] It corresponds to sediments whose depositional environment evolved from the paralic domain (coastal lagoons, tidal marsh, tidal muddy channel) at the base of the formation, towards a more continental domain (alluvial plain, fluvial channels) in its upper part.[1] The Marnes d’Auzas Formation was deposited in the west coast of the former Ibero-Armorican Island, which included much of France and Spain.[2]
- ^ a b c Laurent, Y. (2003). "Les faunes de vertébrés continentaux du Maastrichtien supérieur d'Europe : systématique et biodiversité". Strata (41): 1–81.
- ^ Csiki-Sava, Z.; Buffetaut, E.; Ősi, A.; Pereda-Suberbiola, X.; Brusatte, S.L. (2015). "Island life in the Cretaceous-faunal composition, biostratigraphy, evolution, and extinction of land-living vertebrates on the Late Cretaceous European archipelago". ZooKeys (469): 1–161. doi:10.3897/zookeys.469.8439. PMC 4296572. PMID 25610343.