Trapa-Trapa Formation

Trapa-Trapa Formation
Trapa-Trapa Formation
Stratigraphic range: Miocene
Type	Geological formation
Underlies	Cola de Zorro Formation; Campanario Formation
Overlies	Cura-Mallín Group
Lithology
Primary	Andesitic lava, basaltic andesite lava, pyroclastic rocks, epiclastic rocks
Other	Basaltic lava, dacitic lava, tuff
Location
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Region	Araucanía, Bío Bío & Maule Regions; Neuquén Province
Country	Chile, Argentina
Type section
Named for	Estero Trapa-Trapa
	Trapa-Trapa Formation (Chile)

Trapa-Trapa Formation (Spanish: Formación Trapa-Trapa) is a volcano-sedimentary formation of Miocene age in south-central Chile and nearby parts of Argentina. The largest outcrops lie in the Andes, while the Chilean Central Valley host some of the smaller outcrops. The volcanic rocks of the formation are of calc-alkaline character, and are less silicic than contemporary volcanic rocks found further north in the Farellones Formation.^[1]

References

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v t e Geology of Chile
Sedimentary basins	Altiplano Arauco Aysén Caldera Neuquén Magallanes Osorno–Llanquihue Pucatrihue Salar de Atacama Salta Santiago Temuco Valdivia
Faults	Atacama Fault Biobío-Aluminé Fault Cachet Fault Domeyko Fault El Arrayán Fault Futrono Fault Gastre Fault Lanalhue Fault Liquiñe-Ofqui Fault Magallanes-Fagnano Fault Mocha-Villarrica Fault Pichilemu Fault Reigolil-Pirihueico Fault San Ramón Fault Valeriano Fault
Batholiths	Coastal central Chile Elqui-Limarí Futrono-Riñihue North Patagonian Panguipulli South Patagonian Vicuña Mackenna
Metamorphic complexes	Bahía Mansa Belén Chañaral Choapa Chonos Cordillera Darwin Eastern Andes Mejillones Puerto Edén Punta de Choros Quebrada del Carrizo Trafún Tierra del Fuego
Terranes	Arequipa-Antofalla Chaitenia Chilenia Chiloé Cuyania Fitz Roy Madre de Dios Mejillonia Patagonia
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