Fold Mountains ⛰ Flashcards
What type of margins are fold mountains formed at?
Destructive/collisional
What is an anticline?
The folding over a feature
What is a syncline?
Folding down
What is the first step to fold mountain formation?
Sediment accumulates in shallow seas or depressions known as geosynclines as rivers enter those areas
What is step two?
A bed of layered sedimentary rocks is created as compression occurs
What is step three?
Plates move together due to convection currents in the mantle which crumples the Rock together
What’s step four?
Rock starts to form folds which have anticlines and synclines that push up
How many tourists visit the Alps each year?
100 million
What percentage go for skiing etc in winter?
70%
What percentage of electricity in Berne is sourced from the Alps?
60% (from HEP power stations)
What type of trees have been planted in the Alps?
Scots pine because of goat munching
What are trees used for in the Alps?
Making furniture
How are ocean trenches formed?
The heavy, oceanic plate meets the continental plate and it bends downwards.
The place where the heavier plate meets the lighter is called the subduction zone.
What is an overfold?
When an anticline goes over the top of itself
