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Fold Mountains

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by

Miss Cummins

on 1 October 2015

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Transcript of Fold Mountains

Fold Mountains
Ms. Cummins
Today we will look at:
How fold mountains are formed.

What plates are involved.

Periods of folding.
Formation
Fold mountains are formed when two plates
collide
with each other.
Revision Questions
Page 76 to 79 in your book

Oceanic plate and a continental plate are pushed together and collide.

The
HEAVIER
oceanic plate sinks underneath the continental plate and into the mantle.
The
continental
plate then buckles upwards - it has no where else to go.

Fold mountain is formed.

The magma, formed from oceanic plate melting into the mantle, can move to the surface, forming . . . ?
Example : Andes Mountains

Formed when the
Nazca
plate collided with the continental
South American
Plate.
If two continental plates collide - both buckle upwards.

Example:
Himalayas
>
Indo-Australian
Plate is colliding with
Eurasian
Plate.
Anticline
= up-fold

Syncline
= down-fold
Periods of folding
Alpine
Armorican
30 - 35 million years ago

Alps
in Europe

Andies
in South America

Rockies
in North America

Himalayas
in Asia
250 million years ago

Eurasion Plate collided with the African Plate

Many Irish mountains formed in this time

Full transcript