Hazards (plate tectonics) 0.0 / 5 ? GeographyPlate tectonicsA2/A-levelAQA Created by: 12aatkinCreated on: 02-05-19 20:45 lithosphere the crust and upper mantle, it is the zone that the tectonic plates are formed 1 of 8 asthenosphere the upper layer of the earths mantle, below the lithosphere. its a layer of solid rock that has so much pressure and heat the rocks flow like liquid 2 of 8 continental crust 35-70km thick, granite, silica and aluminium, more dense 3 of 8 Oceanic crust 5-10km thick, basaltic rock, silica and magnesium, less dense 4 of 8 Continental drift the theory that continental land masses have changed position over 5 of 8 gravitational sliding the movement of tectonic plates as a result of gravity 6 of 8 Ridge push the high elevation at mid-ocean-ridge that causes gravity to push the lithosphere that is further from the ridge. 7 of 8 Slab pull flowing subduction, the lithosphere sinks into the mantle under its own weight helping to pull the rest of the plate with it 8 of 8
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