Coihaique Group
Coihaique Group | |
---|---|
Stratigraphic range: Late Jurassic–Aptian | |
![]() Toqui Formation with Chilesaurus fossils | |
Type | Geologic group |
Unit of | Aysén Basin |
Sub-units | Apeleg Formation Katterfeld Formation Toqui Formation |
Underlies | Divisadero Group |
Overlies | Ibáñez Formation |
Lithology | |
Primary | Shale, volcaniclastic rocks, sandstone |
Other | Turbidite |
Location | |
Region | Aysén Region, Patagonia |
Country | ![]() |
The Coihaique Group is a group of geological formations in northwestern Patagonia. From top to bottom the formations that make the group are Apeleg, Katterfeld and Toqui. The contact between the formations of the group are diachronous with Katterfeld Formation interfingering with the formations on top and below it. The lower and upper boundaries of the group are unconformities formed by erosion. The older parts of Coihaique Group represent a marine transgression while the younger parts evidences a return to non-marine conditions.[1]
Fossils in Toqui Formation
The rock formation preserves fossils from the Late Jurassic period of the Mesozoic Era.
Fossils of Chilesaurus (147 Ma) were found in the Aysén Region of Patagonia. It is an extinct genus of theropods in the family Tetanurae.[2] The fossil record also comprises a sauropod Titanosaur, a Camarasaur and a Diplodocid.
See also
References
- ^ Suárez, Manuel; de la Cruz, Rita (1994). Estratigrafía y paleogeografía mesozoica de Aisén nororiental (45-46 lat.s.), Chile (PDF). 7° Congreso Geológico Chileno (in Spanish). Concepción: Universidad de Concepción. pp. 538–542. Archived from the original (PDF) on December 28, 2017.
- ^ news.nationalgeographic.com National Geographic.com: "T. rex's Oddball Vegetarian Cousin Discovered", by Michael D. Lemonick, 2015-04-27.
- CS1 Spanish-language sources (es)
- Articles with short description
- Short description is different from Wikidata
- Chile articles missing geocoordinate data
- All articles needing coordinates
- Articles missing coordinates without coordinates on Wikidata
- Geologic groups of South America
- Geologic formations of Chile
- Jurassic System of South America
- Late Jurassic South America
- Jurassic Chile
- Lower Cretaceous Series of South America
- Cretaceous Chile
- Shale formations
- Sandstone formations
- Austral or Magallanes Basin
- Paleontology in Chile
- Geology of Aysén Region
- All stub articles
- Chile geography stubs
- South American geologic formation stubs