Traiguén Formation
Traiguén Formation (Spanish: Formación Triaguén) is a volcano-sedimentary formation of Miocene age, located in the archipelagoes of Aysén Region of western Patagonia.
| Traiguén Formation Stratigraphic range: Early Miocene | |
|---|---|
| Type | Geological formation |
| Lithology | |
| Primary | Tuff, basaltic pillow lava, breccia, sandstone, shale |
| Location | |
| Region | Aysén Region |
| Country |  |
| Type section | |
| Named for | Traiguén Island |
| Named by | Espinoza and Fuenzalida (1971) |
Geology
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]
gollark: Oh, and how English secretly has strictish adjective ordering.
gollark: It's also been shown that if I say the the word "the" twice, you're unlikely to notice. Mostly in longer paragraphs, but it might work here too.
gollark: The amazing power of the brain and possibly your previous exposure to bad english.
gollark: I should test this maybe?
gollark: Apparently you can generally recognize a word even if it's been reordered (apart from the first and last letters).
See also
- Geology of Aysén Region
- Stratigraphy of Chile
References
- 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.
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