Traiguén Formation
{{Infobox rockunit
| name = Traiguén Formation
| image =
| caption =
| type = Geological formation
| period = Miocene
| age = Early Miocene
| prilithology = Tuff, basaltic pillow lava, breccia, sandstone, shale
| otherlithology =
| namedfor = Traiguén Island
| namedby = Espinoza & Fuenzalida
| year_ts = 1971
| region = Aysén Region
| country = Chile
| coordinates = {{coord|45.2|S|74.5|W|display=inline,title}}
| unitof =
| subunits =
| underlies =
| overlies =
| thickness =
| extent =
| area =
| map = {{Location map+ | Chile
| relief = 1
| width = 200
| float = center
| places =
{{Location map~ | Chile
| lat_deg = -45.2
| lon_deg = -74.5
| mark = Yellow pog.svg
| marksize = 12
}}
}}
| map_caption =
}}
Traiguén Formation ({{langx|es|Formación Traiguén}}) is a volcano-sedimentary formation of Miocene age, located in the archipelagoes of Aysén Region of western Patagonia.
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.{{cite journal |last=Encinas |first=Alfonso |last2=Folguera |first2=Andrés |last3=Oliveros |first3=Verónica |last4=De Girolamo Del Mauro |first4=Lizet |last5=Tapia |first5=Francisca |last6=Riffo |first6=Ricardo |last7=Hervé |first7=Francisco |last8=Finger |first8=Kenneth L. |last9=Valencia |first9=Víctor A. |last10=Gianni |first10=Guido |last11=Álvarez |first11=Orlando|author-link7=Francisco Hervé |date=2016 | title=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 |journal=Geological Society of America Bulletin |volume=128 |issue=5–6 |pages=807–823 |doi= 10.1130/b31303.1|hdl=11336/21842 |hdl-access=free }}
See also
- {{C|Geology of Aysén Region}}
- {{C|Stratigraphy of Chile}}
References
{{reflist}}
{{Geology of Chile}}
{{DEFAULTSORT:Traiguen Formation}}
Category:Geologic formations of Chile
Category:Miocene Series of South America