Cerro Negro Formation, Argentina
Cerro Negro Formation Stratigraphic range: Ediacaran < | |
---|---|
Type | Formation |
Unit of | |
Underlies | |
Overlies | Sierra Bayas Group |
Thickness | >150 m (490 ft) |
Lithology | |
Primary | Shale, sandstone |
Other | Marl |
Location | |
Coordinates | 37°12′04.3″S 60°20′48.1″W / 37.201194°S 60.346694°WCoordinates: 37°12′04.3″S 60°20′48.1″W / 37.201194°S 60.346694°W |
Region | Buenos Aires Province |
Country | ![]() |
Extent | Río de la Plata Craton |
![]() ![]() Cerro Negro Formation, Argentina (Argentina) |
The Cerro Negro Formation is a sedimentary formation of Ediacaran age in Buenos Aires Province, Argentina. The formation crops out along the , a chain of hills made up by of ancient rocks. Together with the formations of the underlying Sierra Bayas Group it is contains the oldest sedimentary formations in Argentina that have not been subject to significant metamorphism or deformation. In 2015 a complete revision of the formation was proposed.[1]
Fossil content[]
Soft-bodied discoidal specimens resembling Aspidella are described from the formation, that has been estimated as not older than 565 Ma.[2]
See also[]
- Dyke swarms of Tandil and Azul
- Puncoviscana Formation
- Nama Group
References[]
Bibliography[]
- Ediacaran discs from South America: probable soft-bodied macrofossils unlock the paleogeography of the Clymene Ocean. Scientific Reports 6. Article number 30590. Accessed 2019-02-12. ; ; ; ; ; , and . 2016.
- Sedimentología y estratigrafía del Grupo La Providencia (nom. nov.): cubierta superior neoproterozoica, Sistema de Tandilia, Argentina. Latin American Journal of Sedimentology and Basin Analysis 22. 171–189. Accessed 2019-02-12. ; ; , and . 2015.
Categories:
- Geologic formations of Argentina
- Ediacaran South America
- Shale formations
- Sandstone formations
- Marl formations
- Tidal deposits
- Paleontology in Argentina
- Geology of Buenos Aires Province