Traiguén Formation (Spanish: Formación Traiguén) is a volcano-sedimentary formation of Miocene age, located in the archipelagoes of Aysén Region of western Patagonia.

Traiguén Formation
Stratigraphic range: Early Miocene
TypeGeological formation
Lithology
PrimaryTuff, basaltic pillow lava, breccia, sandstone, shale
Location
Coordinates45°12′S 74°30′W / 45.2°S 74.5°W / -45.2; -74.5
RegionAysén Region
Country Chile
Type section
Named forTraiguén Island
Named byEspinoza & Fuenzalida
Year defined1971
Traiguén Formation is located in Chile
Traiguén Formation
Traiguén Formation (Chile)

Geology

edit

The volcanic and sedimentary rocks were deposited in a marine environment. Neither the base nor the top of the formation is known. Copious dykes of basic composition and aphanitic texture intrude the formation.

At some locations Miocene plutons of the North Patagonian Batholith intrude the Traiguén Formation. The intruded plutons are of varied composition including gabbro and granodiorite.[1]

See also

edit

References

edit
  1. ^ Encinas, Alfonso; Folguera, Andrés; Oliveros, Verónica; De Girolamo Del Mauro, Lizet; Tapia, Francisca; Riffo, Ricardo; Hervé, Francisco; Finger, Kenneth L.; Valencia, Víctor A.; Gianni, Guido; Álvarez, Orlando (2016). "Late Oligocene–early Miocene submarine volcanism and deep-marine sedimentation in an extensional basin of southern Chile: Implications for the tectonic development of the North Patagonian Andes". Geological Society of America Bulletin. 128 (5–6): 807–823. doi:10.1130/b31303.1. hdl:11336/21842.