Oxaya Formation
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]
Oxaya Formation Stratigraphic range: Late Oligocene–Early Miocene | |
---|---|
Underlies | Zapahuira Formation, Huaylas Formation |
Overlies | Azapa 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 |
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.
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