How Are Mountains Formed?
Mountains just don t appear in any place. Most are formed when plates, or
huge pieces of the Earth s crust, pull and push against each other. Great
mountain ranges are formed by the movement of tectonic plates. Convection
currents deep in the mantle of the earth, begins to well up towards the
surface. As the pressure increases, it sets the crustal plates in motion.
There are different kinds of mountains – Volcanic, Folded, Fault-block, and
Dome mountains. Volcanic mountains are formed when magma comes up
through cracks in the Earth s crust and explodes out lava and ash. The
examples of volcanic mountains. Rocks are hard but in time they can bend or
fold producing Folded mountains. The Alps formed as the Eurasian plate
Rockies, Himalayas, Appalayas, and the Andes. Fault-block mountains are
formed when one plate pushes or pulls away from another plate. In the Earth,
hot currents of magma or molten rock may well up and crack the weakened
crust above. As the crust cracks, blocks of rock rise or fall forming
California and the Grand Tetons in Wyoming. Dome mountains are formed
the molten rock pushes the ground up into a dome. Examples are Yosemite s
out when they took limestone off Mt. Everest and found dead sea creatures.
Limestone is a kind of rock that is formed very slowly over thousands of
Limestone and fossils are common in most mountains that originated at the
bottom of the sea. It is really amazing how mountains are formed by forces
of the earth.