Allen Formation

Allen Formation
Stratigraphic range: Mid Campanian-Maastrichtian
~73–69 Ma
Outcrop of the Allen and Anacleto Formations at Auca Mahuida
TypeGeological formation
Unit ofMalargüe Group
UnderliesJagüel Formation
OverliesAnacleto Formation
Thicknessup to 70 m (230 ft)
Lithology
PrimaryMudstone, sandstone
OtherLimestone
Location
Coordinates40°00′S 66°36′W / 40.0°S 66.6°W / -40.0; -66.6
Approximate paleocoordinates42°48′S 52°12′W / 42.8°S 52.2°W / -42.8; -52.2
RegionNeuquén, Río Negro & La Pampa Provinces
CountryArgentina
ExtentNeuquén Basin
Type section
Named byUliana & Dellapé
Year defined1981
Allen Formation is located in Argentina
Allen Formation
Allen Formation (Argentina)

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]

  1. ^ Salgado et al., 2007
  2. ^ Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 600-604. ISBN 0-520-24209-2.
  3. ^ Cite error: The named reference MF04 was invoked but never defined (see the help page).