Allen Formation | |
---|---|
Stratigraphic range: Mid Campanian-Maastrichtian ~ | |
Type | Geological formation |
Unit of | Malargüe Group |
Underlies | Jagüel Formation |
Overlies | Anacleto Formation |
Thickness | up to 70 m (230 ft) |
Lithology | |
Primary | Mudstone, sandstone |
Other | Limestone |
Location | |
Coordinates | 40°00′S 66°36′W / 40.0°S 66.6°W |
Approximate paleocoordinates | 42°48′S 52°12′W / 42.8°S 52.2°W |
Region | Neuquén, Río Negro & La Pampa Provinces |
Country | Argentina |
Extent | Neuquén Basin |
Type section | |
Named by | Uliana & Dellapé |
Year defined | 1981 |
The Allen Formation is a geological formation in Argentina whose strata date back to the Late Cretaceous (middle Campanian to early Maastrichtian.[1] Dinosaur remains are among the fossils that have been recovered from the formation.[2] Indeterminate chelid remains and other vertebrates have also been discovered in this formation.[3]
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