La Cascada Formation

La Cascada Formation
La Cascada Formation
Stratigraphic range: Late Oligocene–Early Miocene
Type	Geological formation
Overlies	Cretaceous granitoids; Divisadero Group; Lower Jurassic volcanic rocks
Thickness	130 m (430 ft)
Lithology
Primary	Sandstone, siltstone, conglomerate
Location
Region	Los Lagos Region
Country	Chile
Type section
Named by	Thiele et al.
Year defined	1978

La Cascada Formation a sedimentary formation near Futaleufú in the western Patagonian Andes of southern Chile. Lithologies vary from sandstone, siltstone and conglomerate. The sediment that now forms the rock deposited during the Oligocene and Early Miocene epoch in shallow marine environment. The formation contain fossils of bivalves and gastropods.^[1]

Further south in Aysén Region, the Guadal Formation is a geologically equivalent formation.^[1]

References

^ ^a ^b ^c Encinas, Alfonso; Folguera, Andrés; Bechis, Florencia; Finger, Kenneth L.; Zambrano, Patricio; Pérez, Felipe; Benarbé, Pablo; Tapia, Francisca; Riffo, Ricardo; Buatois, Luis; Orts, Darío; Nielsen, Sven N.; Valencia, Victor V.; Cituño, José; Oliveros, Verónica; De Girolamo Del Mauro, Lizet; Ramos, Víctor A. (2018). "The Late Oligocene–Early Miocene Marine Transgression of Patagonia". In Folguera, A.; Contreras Reyes, E.; Heredia, N.; Encinas, A.; Iannelli, S. B.; Oliveros, V.; M. Dávila, F.; Collo, G.; Giambiagi, L.; Maksymowicz, A.; Iglesia Llanos, M.P.; Turienzo, M.; Naipauer, M.; Orts, D.; Litvak, V. D.; Alvarez, O.; Arriagada, C. (eds.). The Evolution of the Chilean-Argentinean Andes. Springer. pp. 443–474. ISBN 978-3-319-67774-3.
^ Charrier, Reynaldo; Pinto, Luisa; Rodríguez, María Pía (2006). "3. Tectonostratigraphic evolution of the Andean Orogen in Chile". In Moreno, Teresa; Gibbons, Wes (eds.). Geology of Chile. Geological Society of London. p. 107. ISBN 9781862392199.