Mesón Group
Geological formation in South America
From Wikipedia, the free encyclopedia
Mesón Group (Spanish: Grupo Mesón) is a Cambrian to Early Ordovician sedimentary group located in the Argentine Northwest and nearby parts of Bolivia. The group members rest unconformably on top of the Ediacaran–Cambrian Puncoviscana Formation. According to G.F. Aceñolaza, the Mesón Basin – the sedimentary basin in which the Méson Group was deposited – was located between the Arequipa and Río de la Plata Cratons.[1]
TypeGroup
Sub-unitsLizoite Fm.
Campanario Fm.
Chahualmayoc Fm.
Campanario Fm.
Chahualmayoc Fm.
UnderliesSanta Victoria Group
OverliesPuncoviscana Formation
| Mesón Group | |
|---|---|
| Stratigraphic range: Cambrian-Tremadocian | |
| Type | Group |
| Sub-units | Lizoite Fm. Campanario Fm. Chahualmayoc Fm. |
| Underlies | Santa Victoria Group |
| Overlies | Puncoviscana Formation |
| Lithology | |
| Primary | Sandstone, siltstone, limestone |
| Location | |
| Coordinates | 23.0°S 65.0°W |
| Approximate paleocoordinates | 45.4°S 128.9°W |
| Region | Jujuy, Salta, Tucumán Potosí Department |
| Country | Argentina Bolivia |
  Mesón Group (Argentina) | |
Stratigraphy
The Mesón Group comprises three formations: Chahualmayoc Formation at the top, Lizoite Formation at the base and Campanario Formation in-between.[2] The group is composed of sandstones, siltstones and limestones.[3][4]