| Los Adobes Formation | |
|---|---|
| Stratigraphic range: Aptian ~ | |
| Type | Geological formation |
| Unit of | Chubut Group |
| Sub-units | Bardas Coloradas member |
| Underlies | Cerro Barcino Formation |
| Overlies | Cañadón Calcáreo Formation (generally) Paso del Sapo Formation (Sierra de Traquetrén) |
| Thickness | Up to 700 m (2,300 ft) |
| Lithology | |
| Primary | Mudstone, sandstone |
| Other | Conglomerate |
| Location | |
| Coordinates | 43°12′S 69°06′W / 43.2°S 69.1°W |
| Approximate paleocoordinates | 44°06′S 35°36′W / 44.1°S 35.6°W |
| Region | Chubut Province |
| Country | Argentina |
| Extent | Cañadón Asfalto Basin |
| Type section | |
| Named by | Tasch & Volkheimer |
| Year defined | 1970 |
  Los Adobes Formation (Argentina) | |
Los Adobes Formation is an Early Cretaceous (Aptian) geologic formation in Chubut Province, in the Cañadón Asfalto Basin of central Patagonia, Argentina. The formation belongs to the Chubut Group and represents the Early Cretaceous K1 megasequence in the basin, unconformably overlying the Late Jurassic Cañadón Calcáreo Formation and is overlain by the Albian Cerro Barcino Formation.
Los Adobes Formation was deposited in an alluvial to fluvial environment and the mudstones of the overall sandy and conglomeratic unit have provided fossils of a chelid turtle whose indeterminate remains were described by Sterli et al. in 2020.