The Alps are the highest
and most extensive mountain range system that lies entirely
in Europe, and stretching approximately 1,200 kilometers (750 mi)
across eight Alpine countries (from west to
east): France, Switzerland, Monaco, Italy, Liechtenstein, Austria, Germany,
and Slovenia.
The mountains were
formed over tens of millions of years as the African and Eurasian tectonic
plates collided.
Extreme shortening caused by the event
resulted in marine sedimentary rocks rising
by thrusting and folding into high mountain peaks such
as Mont Blanc and the Matterhorn. Mont Blanc spans the
French–Italian border, and at 4,810 m (15,781 ft) is the highest
mountain in the Alps.
The Alpine region area contains about a
hundred peaks higher than 4,000 meters (13,000 ft).