How the Mountains Begin?
The Earth’s crust is divided into 17 huge plates called tectonic plates. Tectonic plates are in constant movement, because they rest on the magna underneath. These plates slide one against the other, they collide, they move apart. These movements, as well as causing earthquakes, volcanic eruptions and the Continental Drift, led to the formation of mountain chains.
When two plates press one against the other, the Earth’s Crust is pushed up towards the top and forms mountain chains in ‘folds’. But when the Crust breaks along cracks or fault lines’, great blocks of rocks are thrown up and form mountain chains in ‘blocks’
Interesting things about mountains
- The highrest mountain is Mt.Everest: 8848 meters above sea level.
- Rheinhold Messner was the first mountaineer to climb all 14 mountains higher than 800m without oxygen cylinders.
- The most extensive mountain chain in the world is the Andes in South America, with a length of 7200Km.
- Mountains make up about one-fifth of the world's landscape, and provide homes to at least one-tenth of the world's people.
- There are mountains under the surface of the sea!.
- The highest 14 mountains in the world are all found in the Himalayas.
- About 80 per cent of our planet's fresh water originates in the mountains.
- Because of tectonic plate movement, Everest grows about 4mm a year.