Country: Brazil, Venezuela, Guyana
Height: 2810 m above sea-level
Prominence: 2338 m
First ascent: 1884 E. im Thurn and H. Perkins
Roraima – tepui highest mountain (2810 m) lies on the border of Venezuela, Guyana, and Brazil, in the Canaima National Park, the Guiana Highlands. This is one of two available for visiting tepui (entrance and back together takes about 5 days and is only possible with a guide.) The conditions at the top are extremely difficult for plants.
Sources of the river are here: Branco and Caroni. The top has an interesting geological form is characterized by vertical walls and a flat top. Roraima and the surrounding tepui are considered by some of the oldest geological formations on Earth, reaching the Precambrian era. Rock formations and endemic plants like the world dating back more than a half-billion years. One-third of the plants Roraimy not occur anywhere else in the world. There also exist a few animals that have adapted to extreme conditions. An interesting discovery was a black frog, which was known previously only from Africa. This confirms the theory that these two continents were once joined. Some researchers believed that Roraima is the last lost world – that they live on that plateau last great dinosaurs, such as for example Tyrannosaurus rex and pterodactyl, big tarantulas, monkeys-like australopithecines or other fossil apes. Currently, the plateau is available on five-day guided tours so it is certain that such animals do not occur there. The first ascent to the top of Everard im Thurn made and Inniss Harry Perkins in 1884.
Highlands of Venezuela and the countries lying east of them up on the north side of the Amazon, the great semicircle of mountains table. In a place where touching the borders of three countries – Venezuela, Brazil and Guyana – the biggest lie of them, called Roraima massif. £ ańcuch this, attaining an altitude of 2810 meters, rises on the plain as the nose of the great ship.
Plateau dates back 300 million years old and was once the bottom of large, shallow lakes and deltas. With time the area was wypiętrzony by motions of the earth, and under the influence of erosion created the mountains and rocky outcrops.
In some places, preserved in the rocks left by the rippling water. It can be seen on top of the mountains. Roraima is a local name, a significant mother stream – often falling tytaj torrential rains fed rivers in the three neighboring countries.