Paso Flores Formation
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The Paso Flores Formation is a latest Late Triassic (Rhaetian) geologic formation in the Neuquén Basin of Neuquén Province in northwestern Patagonia, Argentina. The brown to red-stained conglomerates, sandstones and shales of the formation represent the youngest and only latest Triassic sedimentary unit in the country, overlying basement.
Quick Facts Type, Underlies ...
Paso Flores Formation | |
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Stratigraphic range: Latest Late Triassic ~205–202 Ma | |
Type | Geological formation |
Underlies | Sañicó, Nestares, Collón Curá, Caleufú & Cerro Petiso Formations |
Overlies | Cushamen basement |
Thickness | Up to 230 m (750 ft) |
Lithology | |
Primary | Conglomerate, sandstone |
Other | Shale |
Location | |
Coordinates | 40.5°S 70.5°W / -40.5; -70.5 |
Approximate paleocoordinates | 50.1°S 31.1°W / -50.1; -31.1 |
Region | Neuquén Province |
Country | Argentina |
Extent | Southern Neuquén Basin |
Type section | |
Named for | Balsa Paso Flores |
Named by | Fossa Mancini |
Year defined | 1937 |
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The formation has provided a rich fossil flora of various groups, preserved in leaves and fossil wood in the finer lithologies in the Paso Flores Formation. The fossil flora is representative of the ecosystem of the latest Triassic, preceding the Triassic-Jurassic extinction event.