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Oxaya Formation

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Oxaya Formation
Stratigraphic range: Late OligoceneEarly Miocene
UnderliesZapahuira Formation, Huaylas Formation
OverliesAzapa Formation, Lupica Formation?
Thicknessca. 1,000 m (3,300 ft)
Lithology
PrimaryIgnimbrite
Location
RegionArica y Parinacota Region
CountryChile
Type section
Named forOxaya

Oxaya Formation (Spanish: Formación Oxaya) is a geological formation in northern Chile made up of ignimbrite sheets. The formation formed about 25 to 19 million years ago in the Late Oligocene and Early Miocene.[1] Oxaya Formation is deformed by the Oxaya anticline.[2]

References

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  1. ^ García, Marcelo; Herail, Gérard; Charrier, Reynaldo (1999). Age and structure of the Oxaya Anticline: A major feature of the Miocene compressive structures of northernmost Chile (PDF). Fourth ISAG. Goettingen, Germany. pp. 249–252.
  2. ^ Zeilinger, Gerold; Schlunegger, Fritz; Simpson, Guy (2005). "The Oxaya anticline (northern Chile): a buckle enhanced by river incision?". Terra Nova (17): 368–375.