World Continent General Considerations For South America Geological History. We can group the geological history of South America into three distinct stages of development. Each of them conforms to an important division of geological time. The first phase comprised a pre-Cambrian period (4,600 to 541 million years ago). Characterized by a series of complex pieces …
South America Geological History
World Continent General Considerations For South America Geological History
Its second level coincides with the Paleozoic (541 to $252 million). Which the craton and accumulated materials contributed to form the supercontinent Gondwana (or Gondwana), and then even larger Pangu (Pangu). The third stage, emerge of the current continental formation, occurred in the Mesozoic and Cenozoic (252 million years). Including Pangu and Gondwana, open the South Atlantic and create the disintegrated Andes. Cordillera.
The current tectonic framework of South America comprises three basic units: the old craton, the nearest Andes and several basins. Five-cratons (Amazonia, San Francisco, Luis Alves, Upper Paraguay, and La Plata). The Precambrian nucleus of South America and (except for Paraguay), now shown as arranging South Dwarf from the North solid. In the eastern part of the African continent; a series of other Precambrian bark blocks have increased along the southern American edge throughout the geological period. The high range and the Andes, along the entire western edge of the African continent. Rise over the inter-mountain plateau and represent the Pacific Plate. The Cenozoic collisions of South America (66 million years ago) open to the South Atlantic. A large capacity of sediment between the cratons of the Andes and the entire eastern edge of the Andes, decaying.
South America Geological History: Trans-Amazonian Cycle
Transamazonian rocks can subdivide into three distinct groups. Orogenic belts such as the Amazonian Maroni-Itacaiúnas belt or San Francisco’s Salvador-Juazeiro belt. It covers stable rocks such as the Bahia Chapada Diamantina formation or the Carajas and Roraima platforms Sediments. Large groups of dikes (plate-like intrusions of igneous rocks in sedimentary strata). The orogenic belt is the ancient mountains formed along the edge of the continent. Such as the earth’s crust (the lower layer of the earth’s crust) and then rises. Such as the Maroni-Itacaiúnas belt, or the collision between the continental blocks, El Tandil belt in Buenos Aires, Argentina.