Mesón Group

Mesón Group Stratigraphic range: Cambrian
Type	Group
Sub-units	Lizoite Fm. Campanario Fm. Chahualmayoc Fm.
Overlies	Puncoviscana Formation
Location
Country	Argentina, Bolivia

Mesón Group (Spanish: Grupo Mesón) is a Cambrian sedimentary formation 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.

Mesón Group compromises three formations: Chahualmayoc Formation at the top, Lizoite Formation at the base and Campanario Formation in-between.