Flashcards
Plate Tectonics
Cards in this deck (23)
- 1Plate tectonicsThe study of the processes that cause the movement of the earth's plates and the landforms that result.
- 2What fuels the movement of the plates?Thermal convection currents
- 3DivergingSeperating
- 4ConvergingComing together
- 5Sea-floor spreading suggests that....the ocean floors widen as nwe rock is formed where plates have split apart
- 6e.g. of sea floor spreadingMid-Atlantic Ridge between Eurasian and North American plates
- 7Proof of sea floor spreadingOlder at the boundary, younger towards the continents
Magnetisms
Deposits of sediment folloeing glaciation
Young/old volcanic islands - 8Sea-floor spreading was proposed byHarry Hess 1960s
- 9Continental drift suggests thatThe continents are transported across th planet by convection currents
- 10SupercontinentPangaea
- 11Ocean surrounding PangaeaPanthalassa
- 12Two main continents after PangaeaGondwanaland, Laurasia
- 13Proof of continental driftConinents fit together like a jigsaw
Fossils e.g. South America and Africa
Similar mountain trends and rocks - 14What particular fossil helped to prove continental drift?Mesosaurus remains
- 15Three types of plate boundariesDestructive/convergent
Conservative/passive
Constructive/divergent - 16e.g. of divergent plate boundaryEurasian and North American (Mid-Atlantic Ridge)
- 17e.g. of passive plate boundaryPacific (6cm NW per year) and North American (1cm NW per year) San Andreas fault
- 18e.g. of destructive plate boundary (oceanic oceanic)Pacific subducting under Philippine plate (Mariana trench)
- 19e.g. of destructive plate (oceanic continental)The Andes Nazca and South American Plate
The Rockies Pacific and North American plates - 20e.g. of destructive plate (continental continental)Eurasian and Indo-Australian plate (Himilayas)
- 21bubbles of magma rising from the mantleplumes
- 22Subductiona heavier plate sinks underneath a lighter one
- 23e.g. of rift where plates are seperatingEast African Rift Valley
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- Leaving Certificate Geography (Plate Tectonics) Flashcards on Plate Tectonics, created by eimearkelly3 on 21/06/2013.
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