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types of mountain (backup)

mountain types (there are 5)

Jeremy Tienkamp

on 22 April 2010

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Transcript of types of mountain (backup)

Types of mountains There are five types of mountains... These are: Fold Mountains (Folded Mountains)
Fault-block Mountains (Block Mountains)
Dome Mountains
Volcanic Mountains
Plateau Mountains
Fold Mountains These mountains are the most common type of mountain. The world’s largest mountain's are fold mountains.
Fold mountains are formed when two plates hit each other, and their edges crumble the same way as a piece of paper folds when pushed together. some famous types are the:
Himalayan Mountains in Asia
the Alps in Europe
the Andes in South America
the Rockies in North America
the Urals in Russia Fact: The Himalayan Mountains were formed when India crashed into Asia and pushed up the tallest mountain range on the continents. Fault-block Mountains Fault-block Mountains form when faults or cracks in the earth's crust force some material over and under one another.
Instead of the earth folding over, the earth's crust pulls apart. It breaks up into blocks or chunks.
Sometimes these blocks of rock move up and down, as they move apart and blocks of rock end up being stacked on top of each other. Examples of fault-block mountains are: Sierra Nevada mountains in North America and the Harz Mountains in Germany Dome Mountains Dome mountains are the result of lots of magma pushing its way up under the earth crust. Without actually erupting onto the surface, the magma pushes up rock layers. Eventually, the magma cools and forms hardened rock. The uplifted area created by rising magma is called a dome because of looking like the top half of a ball (sphere). The layers over the rock (the one that the magma formed) become warped to make a dome, and the rock surrounding remains flat. The dome is higher than its surroundings, erosion by wind and rain occurs from the top. This makes it become a circuler mountain range. Domes that have been worn away in places form many separate peaks called Dome Mountains. This Volcanic Mountains Volcanic Mountains are formed when magma deep within the earth, erupts, and piles up on the surface. (Magma is called lava when it breaks through the earth's crust.) When the ash and lava cools, it builds a cone of rock. Examples of volcanic mountains include: Mount St. Helens in North America Mount Pinatubo in the Philippines Mount Kea and Mount Loa in Hawaii Plateau Mountains (the last of the 5) These mountains are formed by erosion. Plateaus are large flat areas that have been pushed above sea level by forces within the Earth, or have been formed by layers of lava. They can be discribed as ‘high levels’ of flat land, over 600 meters above sea level. Plateau mountains are mainly near folded mountains. As years pass, streams and rivers break down valleys through the plateau, leaving mountains standing between the valleys. This is a plateau mountain in New Zealand By: Kris Lugtu & Jeremy B-T THE END (FIN) :P Pics by: google
info by: http://www.woodlands-junior.kent.sch.uk/Homework/mountains/types.htm
this was edited so its not copy right :P There are also 7 types of volcanoes 1)Composite Volcanoes (also called strato volcanoes) Composite cone/stratovolcano - These volcanoes are made of layers of rubble, old lava, and dome rocks. They grow to be higher than 3,000 meters above their bases. They are created from multiple eruptions that occur over many years. Composite cones can continue growing with each eruption until their slopes collapse. Examples include Mount St. Helens, Mount Rainier, and Mount Fiji 2) •Domes - Lava domes are found on the outside slopes of composite cones or within their craters. These are little small, but still volcanoes in their own right. Their eruptions can start explosively, forming pits with pyroclastic debris. However, the explosive activity decreases as the gas content and pressure decrease. With lower gas pressure, the lava then flows out slowly, forming thick stubby flows or bulbous domes. 2.) Shield Volcanoes (Also called sheilds volcanoes) Shields occur along the mid-oceanic (which is the middle of the oceaan) ridge, where sea-floor spreading is in progress and along subduction related volcanic arcs Example of sheild volcanoes 3.) Cinder Cones The vent is an opening at the Earth's surface through which volcanic materials are released. A cinder cone is a steep conical hill formed above a vent. Cinder cones grow rapidly and soon approach their maximum size. They rarely exceed 250m in height and 500m in diameter. A great example of a cinder cone is Paricutín in Mexico. It was born in February 20, 1943 in a corn field and grew to 300 feet in 5 days. 4.)Spatter Cones When hot erupting lava contains just enough explosive gas to prevent the formation of a lava flow, but not enough to shatter it into small fragments the lava is torn by expanding gases into fluid hot clots, ranging in size from 1cm to 50cm across, called spatter.
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