Marnes Rouges Inférieures Formation

The Marnes Rouges Inférieures Formation is a Late Cretaceous geologic formation found in the French Pyrenees. It predominantly consists of red mustone, with minor brown mudstone and sandstone.^[1] Dinosaurs, dinosaur eggs and avialian stem-birds have been reported from the formation.^[2]

Marnes Rouges Inférieures Formation
Stratigraphic range: Maastrichtian ~70–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Underlies	Calcaires de Vignevieille
Overlies	Grès d'Alet
Thickness	Over 150 m (490 ft)
Lithology
Primary	Mudstone
Other	Sandstone
Location
Coordinates	42.9°N 2.3°E / 42.9; 2.3
Approximate paleocoordinates	34.8°N 2.0°E / 34.8; 2.0
Region	Occitania
Country	France
Type section
Named for	French: "Lower Red Marls"
Marnes Rouges Inférieures Formation (France)

Fossil content

Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon		Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Dinosaurs

Ornithischians

Ornithischians of Marnes Rouges Inférieures Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Rhabdodon	R. priscus				A rhabdodontid ornithopod

Sauropods

Sauropods of the Marnes Rouges Inférieures Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Ampelosaurus	A. atacis				A lirainosaurine lithostrotian
Lirainosaurus	L. astibiae				A lirainosaurine lithostrotian

Theropods

Theropods of the Marnes Rouges Inférieures Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Gargantuavis	G. philoinos				A gargantuaviid avialan

Crocodilians

Crocodilia of the Marnes Rouges Inférieures Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Allodaposuchus	A. precedens				A allodaposuchid eusuchian

Turtles

Turtles of the Marnes Rouges Inférieures Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Foxemys	F. mechinorum				A bothremydid side-necked turtles

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with dinosaur trace fossils
    • Dinosaur eggs