Valle Alto Formation
| Valle Alto Formation | ||
|---|---|---|
Ma | ||
| Type | Approximate paleocoordinates 3°06′N 72°24′W / 3.1°N 72.4°W | |
| Region | Caldas | |
| Country |  Colombia | |
 Paleogeography of Northern South America 150 Ma, by Ron Blakey | ||
The Valle Alto Formation (
Etymology
The formation was described and named in 1977 by González et al. after Hacienda Valle Alto, San Félix, Caldas.[1][2]
Lithologies
The Valle Alto Formation is composed of shales, sandstones and conglomerates.[3]
Stratigraphy, age and depositional environment
The Valle Alto Formation, part of the Quebradagrande Complex, is not defined as a proper formation, rather as a collection of rocks of different facies origin segmented by tectonic forces of the Central Ranges.[1]
The Valle Alto Formation has been deposited as the result of marine incursions from the proto-Caribbean into Colombia, preceding the larger-scale
Fossil content
Fossils of
Outcrops
The Valle Alto Formation is found near its type locality in the Central Ranges of the Colombian Andes, around Pácora and Salamina.[1]
See also
- Geology of the Eastern Hills
Geology of the Ocetá Páramo
Geology of the Altiplano Cundiboyacense
Notes
- ^ Piazopteris branneri listed as the Permian genus Glossopteris (branneri)[5]
References
Bibliography
- Mojica, Jairo, and Andreas Kammer. 1995. Eventos Jurásicos en Colombia. Geología Colombiana 19. 165-172. Accessed 2017-05-05.
- Mojica, Jairo. 1984. An outline on the Jurassic in Colombia. Geología Colombiana 13. 129-136. Accessed 2017-05-05.
- Moreno Sánchez, Mario; Arley de Jesús Gómez Cruz, and Luz Mary Toro. 2007. Proveniencia del material clástico del complejo Quebradagrande y su relación con los complejos estructurales adyacentes. Revista Boletín Ciencias de la Tierra 22. 27-38. Accessed 2017-05-05.
- Various, Authors. 2009. Plan de Manejo 2008 - 2012 - Parque Nacional Natural Selva de Florencia, 1-141. Isagen. Accessed 2017-05-05.
Maps
- Mosquera, Darío; Pedro Martín; Carlos Vesga, and H. González. 2009. Plancha 206 - Manizales - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
