Which fold mountain building era is the oldest and how old?
Caledonian 450 MYA
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15
Which plate is more dense Oceanic or continental?
Oceanic crust is denser but shorter in lenght KMs deep
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15
What 2 theories make up the theory of plate tectonics?
Sea floor spreading and Continental drift
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20
An example of a Caledonian era mountain range
the 12 pins Connemara, Galway, Dublin/ Wicklow mountains
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15
Give 3 reasons supporting Wegeners theory of Continental drift
Fossils match, jigsaw, coral, mountains, rocks
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trap
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star
Double points!
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gift
Win 20 points!
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lifesaver
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20
Give a named example of a Transform boundary + what plates involved
San andreas fauly - Pacific and N. American plate
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thief
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fairy
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shark
Other team loses 25 points!
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thief
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trap
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rocket
Go to first place!
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shark
Other team loses 25 points!
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thief
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20
An example of the Alpine fold mountain era
The Himalayas, The Alps
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20
Desribe a transform boundary
2 plates slide past eachother. San Andreas fault is an example. Earthquakes occur. No new land created or destroyed as neither plate subducts or seperates
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20
Describe what happens at a Divergent plate boundary
Plates seperate, magma rises to earth and creates new crust. Earthquakes are common here. Mid Atlantic ridge is an example
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15
Who discovered Sea floor spreading?
Harry Hess
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15
What theory did Alfred Wegner propose and what did it entail?
Continental drift...
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20
Give a named example of a convergent plate boundary
The Himilayas - Indian and Eurasian plate
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20
When was the Armorican folding era? and an Irish example