Redonda Formation

Redonda Formation
Stratigraphic range: Norian ~221–206 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Unit of	Chinle Group
Sub-units	Duke Ranch, Quay, Red Peak, San Jon Creek & Wallace Ranch members
Underlies	Entrada Formation
Overlies	Bull Canyon Formation
Thickness	25–425 feet (7.6–129.5 m)
Lithology
Primary	Shale
Other	Limestone, sandstone
Location
Coordinates	34°57′54″N 103°42′04″W / 34.965°N 103.701°W / 34.965; -103.701
Approximate paleocoordinates	9°54′N 43°12′W / 9.9°N 43.2°W / 9.9; -43.2
Region	New Mexico
Country	United States
Type section
Named for	Redonda Mesa
Named by	Dobrovolny and Summerson
Year defined	1946
Redonda Formation (the United States) Show map of the United States Redonda Formation (New Mexico) Show map of New Mexico

The Redonda Formation is a geologic formation exposed in eastern New Mexico.^[1] It contains vertebrate fossils of the late Triassic Period.^[2] Fossil theropod tracks have been reported from the formation.^[3]