Pan de Azúcar Formation
![]() | This article relies largely or entirely on a single source. (November 2016) |
Pan de Azúcar Formation Stratigraphic range: Hettangian-Sinemurian ~ | |
---|---|
Type | Geological formation |
Underlies | La Negra Formation |
Overlies | |
Thickness | 700 m (2,300 ft) |
Lithology | |
Primary | Sandstone, tuff, mudstone, limestone |
Location | |
Coordinates | 25°36′S 70°30′W / 25.6°S 70.5°WCoordinates: 25°36′S 70°30′W / 25.6°S 70.5°W |
Region | Antofagasta Region |
Country | ![]() |
![]() ![]() Pan de Azúcar Formation (Chile) |
Pan de Azúcar Formation (Spanish: Formación Pan de Azúcar, Sugar-loaf formation) is a geologic formation of Hettangian–Sinemurian (Jurassic) age made up of chiefly by sandstone, tuff, mudstone and limestone. The formation is located in the Coast Range of northern Chile. The formation interdigitates and is coeval with the . It concordantly overlies the and is overlain by the La Negra Formation.[1]
At least one location the formation is intruded by a roughly coeval dacite dyke which adds to the evidence that the formation was coeval with the early stages of "Andean" volcanism.[1]
References[]
- ^ a b Suárez, Manuel; Naranjo, José A.; Puig, Álvaro (1985). "Estratigrafía de la Cordillera de la Costa, al sur de Taltal, Chile: Etapas iniciales de la evolución andina". Revista Geológica de Chile (in Spanish). 24: 19–28. Retrieved 16 August 2016.
Categories:
- Geologic formations of Chile
- Early Jurassic South America
- Jurassic System of South America
- Jurassic Chile
- Hettangian Stage
- Sinemurian Stage
- Sandstone formations
- Limestone formations
- Mudstone formations
- Tuff formations
- Geology of the Chilean Coast Range
- Geology of Antofagasta Region