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Chapter 4
Fold Mountains
Question | Answer |
---|---|
Where are fold mountains found | on plate boundaries |
Fold mountains are formed when plates? | Collide |
Are the rocks under great or very little pressure | great |
the rocks are under great pressure so they buckle/dont move | Buckle |
What is the down fold called | Syncline |
what is the up fold called | Anticline |
Name the three Major periods of fold mountain formation | Caledonian , Armorican, Alpine |
when did Caledonian folding occur | 400 million years ao |
when did Armorican folding occur | 250 million years ago |
when did Alpine folding occur | 35 million years ago |
what mountains were formed during the Caledonian time period | Dublin-Wicklow Mountains. |
what mountains were formed during the Armorican time period | Macgillycuuudy's Reeks in Kerry Galtee Mountains in Tip |
what mountains were formed during the Alpine time period | The Rocky Mountains in America the Himalayas in Asia the Alps in Europe the Andes |
which time period has the highest mountains | the Alpine preiod |
why does that period have the highest mountains | they have not been worn down yet |
explain the formation of a fold mountain | when two plates collide the lighter plate is pushed up and the heavier plate is pushed down, the pressure forces the land to buckle upwards into folds |
tell me two economic impacts of living in the alps/fold mountains | Farming: farm sheep and goats moving up the slope to graze Tourism: people can come to hike or climb the mountain |
tell me two social impacts | accessibility: difficult to access as slopes are steep soil: soil can be thin allowing for only rough grazing which can make farming difficult or unprofitable. |