are fold mountains?
mountains are mountains formed from the folding of the earth's
are fold mountains formed?
mountains are formed when two plates move together (a compressional
plate margin). This can be where two continental plates
move towards each other or a continental and an oceanic
plate. The movement of the two plates forces sedimentary
rocks upwards into a series of folds. Fold mountains are
usually formed from sedimentary rocks and are usually found
along the edges continents. This is because the thickest
deposits of sedimentary rock generally accumulate along
the edges of continents. When
plates and the continents riding on them collide, the accumulated
layers of rock crumple and fold like a tablecloth that is
pushed across a table.
are two types of fold mountains: young fold mountains (10
to 25 million years of age, e.g. Rockies and Himalayas)
and old fold mountains (over 200 million years of age, e.g.
Urals and Appalachians of the USA).
activity in fold mountains - The Alps
Alps are home to eleven million people and thus the most
densely populated mountain area in the world. The economy
of this region is based on the exploitation of the coniferous
forest and pasturing dairy cattle, and tourism plays an
the end of the second world war The Alps have become the
winter and summer play ground of European urban dwellers.
The Alps are a very popular destination
amongst winter tourists. Ski resorts such as Val d'Isere
and Les Deux Alps have been purpose-built. These areas are
very crowded in the winter but tend to be quieter in the
summer. However, traditional ski resorts tend to be busy
throughout the year.
Between June and September The Alps is heavily populated
with walkers, cable-car riders and para gliders.
huge number of tourist visitors to The Alps has led to them
becoming the most threatened mountain chain in the world.
This is in terms of its fragile ecological and physical
trees are the main trees forested in the Alps. They are
ideally suited to the Alpine environment. Their conical
shape makes the tree stable in windy conditions. The downward
sloping, springy branches allows the snow to slide of the
tree without damaging its branches.
wide meadows of The Alps make the area ideal for sheep farming.
In the more extreme upland areas goat herding is the main
type of farming. The cold climate and difficult relief make
it almost impossible for arable farming to occur.
power schemes are common in The Alps. The combination of
tectonic and glacial processes make the area ideally suited
for HEP schemes. HEP schemes often involve many different
watersheds. It is an area of excess water and deep U-shaped
valleys. Since the development of HEP at the end of the
19th and the beginning of the 20th centuries these valleys
have been dammed and used to develop HEP.
development of HEP in The Alps led to the establishment
in the lower valleys of electricity-dependent industries,
manufacturing such products as aluminum, chemicals, and