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Tectonic structure of continents

Tectonic structure of continents

A. the continent consists of two main structural elements — Waandishi Vostok platform and folded mountain belt of the Andes

Waandishi platform include Precambrian East SA and epihercynian platform (epibionts) Patagonian plate

The Foundation of the South American platform consists of uneven-aged blocks, consolidated during the period of the upper Proterozoic-early Paleozoic.

The largest of the protrusions of the Foundation — Guiana, Western Brazil and Eastern Brazilian shields;

West Guiana and Brazilian shields almost entirely of glubokoeshelonirovannoj and intensely deformed rocks of the Archean and lower Proterozoic (gneisses, crystalline schists and granites).

The Eastern Brazilian shield consists of separate blocks of early Precambrian – banality (Serra dospinescu, Chapada Diamantina, etc.)

On the Western Guiana and Brazilian shields have survived composing the watershed areas of outcrops of ancient, protoplectron cover, composed of red clastic strata and layers of basalts; in terrain they correspond to tepui and Chapada

Younger case (middle — upper Paleozoic and Mesozoic) performs syneclise platform. Social the inhomogeneous case. In the late Carboniferous — early Perm territory to the South of the Amazon was covered by a cover glaciation. (Perm-Carbuncle Continue reading

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