Oxaya Formation

Oxaya Formation
Oxaya Formation
Stratigraphic range: Late Oligocene–Early Miocene
Underlies	Zapahuira Formation, Huaylas Formation
Overlies	Azapa Formation, Lupica Formation?
Thickness	ca. 1,000 m (3,300 ft)
Lithology
Primary	Ignimbrite
Location
Region	Arica y Parinacota Region
Country	Chile
Type section
Named for	Oxaya

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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

^ 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.
^ Zeilinger, Gerold; Schlunegger, Fritz; Simpson, Guy (2005). "The Oxaya anticline (northern Chile): a buckle enhanced by river incision?". Terra Nova (17): 368–375.

[Tassaraetal1999-1] 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.

[Zeilingeretal2005-2] Zeilinger, Gerold; Schlunegger, Fritz; Simpson, Guy (2005). "The Oxaya anticline (northern Chile): a buckle enhanced by river incision?". Terra Nova (17): 368–375.

[1]