404378
Description
Flashcards by Maire Mohally, updated more than 1 year ago
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Created by Maire Mohally
over 10 years ago
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| Question | Answer |
| Crust | 5-100km think. Contains minerals. Igneous, Sedimentary and Metamorphic |
| Lithosphere | Moho, Upper Mantle and Crust |
| Moho | Thin band near crust. Marks change between mantle and crust |
| Asthenosphere | Upper Mantle. Flows like treacle |
| Upper Mantle | Solid. Lowest part of lithosphere |
| Lower Mantle | Solid and rocky. Silica rock |
| Outer Core | 2200km thick. Iron and nickel. Liquid and metallic |
| Inner Core | 1250km thick. Iron and nickel. Solid and metallic |
| Oceanic Crust. SIMA | 6-12km thick. Dense rock, eg Basalt. Younger. Silicone and Magnesium |
| Continental Crust SIAL | 40-60km think. Less dense, eg Granite. Older. Silicone and aluminium |
| Continental Drift | Wegner. Large land mass: Pangaea. Identical fossils, matching mountains & matching coastline shape |
| Sea Floor Spreading | Hess. Under water volcano. New crust. Existence of mid ocean ridge, varying sea floor age and similar glacial deposits |
| Destructive | Oceanic-Continental Continental- Continental Oceanic-Oceanic |
| O-C Collision | Oceanic slides under, heavier. Melt and Recycled. Explosive Volcanoes, eg Mt St Helens Earthquakes and trenches Pacific Ring of Fire |
| O-O Collision | Trenches and Islands Heavier subducts. Deepest part of ocean. Islands from plums of magma strong earthquakes |
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