Pan de Azúcar Formation
Pan de Azúcar Formation | |
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Stratigraphic range: Hettangian-Sinemurian ~201–191 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
Type | Geological formation |
Underlies | La Negra Formation |
Overlies | Cifuncho Formation |
Thickness | 700 m (2,300 ft) |
Lithology | |
Primary | Sandstone, tuff, mudstone, limestone |
Location | |
Coordinates | ![]() ![]() 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 Posada de los Hidalgo Formation. It concordantly overlies the Cifuncho Formation 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.
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Major South American geological features
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Topographic_map_of_South_America.jpg/120px-Topographic_map_of_South_America.jpg)
- Aguapeí
- Amazon Rift
- Asunción Rift
- Cuyo Rift
- Espino
- Neuquén Rifts
- Paramirim
- Salta Rifts
- Altiplano
- Amazon
- Andean foreland
- Central Brazil
- Chaco
- Colorado
- Cuyo
- Eastern Venezuela
- Golfo San Jorge
- Magallanes
- Malvinas
- Neuquén
- Pantanal
- Paraíba
- Paraná
- Salta
- Solimões
- Andean
- Brasiliano
- Cariri Velhos
- Chonide
- Famatinian
- Gondwanide
- Juruá
- Pampean
- San Rafael
- Sunsás
- Terra Australis
- Tilcarian
- Bolivian Tin Belt
- Chilean Iron Belt
- Deseado Massif
- El Indio Gold Belt
- El Mutún
- Iron Quadrangle
- Lithium Triangle
- Pampean Pegmatite Province
Volcanic provinces | |
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Hotspots |