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The Guiana Highlands are also the source of some of the world's most well-known waterfalls such as Angel Falls, Kaieteur Falls and Cuquenan Falls. The Guiana Shield underlies Guyana (previously British Guiana), Suriname (previously Dutch Guiana), and French Guiana (or Guyane), much of southern Venezuela, as well as parts of Colombia and Brazil.
The northern Guiana Shield, including Guyana is separated from Southern Guiana Shield by ENE to NE trending Tumbes /Guayaquil - Tacutu Tectonic Lineament. This is a major regional pre-Cambrian shear zone / mega-shear which is believed to have been re-activated several times.
It is on the geological Guiana Shield craton, and is the Venezuelan part of the biogeographic Guayana Highlands and their tepuis (mesas). Its limits by the north and east is formed by the route of the rivers Orinoco, Atabapo and Negro Rivers; and by the south the borders with Brazil. The region occupies almost half of the territory of Venezuela ...
The Guianan savanna (NT0707) is an ecoregion in the south of Venezuela, Guyana and Suriname and the north of Brazil. It is in the Amazon biome.The savanna covers an area of rolling upland plains on the Guiana Shield between the Amazon and Orinoco basins.
Before the arrival of European colonials, the Guianas were populated by scattered bands of native Arawak people. The native tribes of the Northern amazon forests are most closely related to the natives of the Caribbean; most evidence suggests that the Arawaks immigrated from the Orinoco and Essequibo River Basins in Venezuela and Guiana into the northern islands, and were then supplanted by ...
The Guayana Highlands — the higher elevations, plateaus, and tepuis (mesas) on the Guiana Shield craton of the South American Plate in northern South America. The heavily forested highlands , located in northern Brazil , Guyana , and Venezuela , have Tropical and subtropical moist broadleaf forest ecoregions .
The Guayanan Highlands ecoregion is an "island" of higher land surrounded by lower grasslands and forests collectively known as the Guiana Shield. Most of the land drains into the Orinoco through the Ventuari, Caroní, Paragua and Caura rivers in Venezuela. In the south, it is drained by the Uraricoera and Branco rivers in Brazil into the ...
The oldest rocks in Venezuela formed during the Precambrian and occupy the Guiana shield in the southern tier of the country near Guyana and Brazil, east of the El BaUl swell. In the western Guiana Shield, within the Amazonas Territory, Precambrian Roraima Formation zircon grains have been dated with uranium-lead dating and rubidium-strontium ...