Earth:Trapa-Trapa Formation
From HandWiki
| 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 | |
| Coordinates | [ ⚑ ] : 38°00′S 71°36′W / 38.0°S 71.6°W |
| 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
- ↑ Muñoz B., Jorge; Niemeyer R., Hans (1984). "Petrología de la formación Trapa-Trapa y consideraciones acerca del volcanismo mioceno entre los 36° y 39° lat. S (codillera principal)". Revista Geológica de Chile 23: 53–67. http://www.andeangeology.cl/index.php/revista1/article/view/V11n3-a04/pdf. Retrieved 23 August 2016.
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