Answers to P54

8 With the aid of a well-labelled diagram, explain the formation of fold mountains at a continental-continental plate boundary. [4]

•2m (diagram) , 0.5m for each point below

•Two continental plates may collide with one another, resisting subduction.

•This causes the plates to break and slide along fractures in the crusts.

•When continental Eurasian plate converge with continental Indian plate,

•the crusts are compressed and they fold upwards or sideways to form fold mountains

P54 Q9

Explain how the plate movement taking place at a  continental-oceanic plate  boundary may produce fold mountains.   [4]

•When an oceanic plate converges with a continental plate

•The denser oceanic plate subducts under the less dense continental plate

•As the continental plate rode over the oceanic plate, the sediment on the ocean floor buckled and crumpled

•This cause an uplift of the crust into the fold mountains