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Ayacara Formation

Coordinates: 42°18′48″S 72°39′04″W / 42.313205°S 72.651125°W / -42.313205; -72.651125
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Ayacara Formation
Stratigraphic range: Early–Middle Miocene
~21.8–17.6 Ma
TypeGeological formation
Thicknessat least 800 m (2,600 ft)
Lithology
PrimarySandstone, siltstone, conglomerate
Location
Coordinates42°18′48″S 72°39′04″W / 42.313205°S 72.651125°W / -42.313205; -72.651125
RegionLos Lagos Region
Country Chile
Type section
Named byLevi et al., 1966
Ayacara Formation is located in Chile
Ayacara Formation
Ayacara Formation (Chile)

The Ayacara Formation is a sedimentary formation made up of interbedded sand and siltstone cropping out around Hornopirén and Ayacara Peninsula in western Los Lagos Region, Chile. Less common rocks are tuff and conglomerate. The formation dates to the Early and Middle Miocene (no earlier than 21.8–17.6 million years ago) when it deposited during a marine transgression.[1]

See also

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References

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  1. ^ 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.; et al. (eds.). The Evolution of the Chilean-Argentinean Andes. Springer. pp. 443–474. ISBN 978-3-319-67774-3.