Redonda Formation
Geologic formation exposed in eastern New Mexico / From Wikipedia, the free encyclopedia
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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]
Quick Facts Type, Unit of ...
Redonda Formation | |
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Stratigraphic range: Norian ~221–206 Ma | |
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 | 34.965°N 103.701°W / 34.965; -103.701 |
Approximate paleocoordinates | 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 |
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