Restless Earth - Supervolcanoes 0.0 / 5 ? GeographyRestless EarthGCSEAQA Created by: 12BECreated on: 30-04-17 12:27 How much material does a supervolcano eject? At least 1000km3 of volcanic material 1 of 17 What was the last known supervolcanic eruption? Toba in Sumatra, 74,000 years ago 2 of 17 What was the effect of the Toba eruption? World temperatures fell by 3-5 degrees 3 of 17 How much volcanic material did Toba eject? 3,000km3 of magma and India was covered in 15cm of ash 4 of 17 Why don't supervolcanoes look the same as volcanoes? They are much larger and have a caldera rather than a cone 5 of 17 Where are supervolcanoes found? They are found on hotspots rather than plate boundaries 6 of 17 What is a hotspot? An area where there is a HUGE magma chamber just under the crust being fed by the mantle 7 of 17 What is a caldera? Large depressions in the land over a supervolcano, often marked by a rim of higher land around the edge 8 of 17 Name 2 supervolcanoes Yellowstone and Toba 9 of 17 How many deaths is Yellowstone predicted to cause? 87,000 10 of 17 How much land would be destoyed by Yellowstone? 1,000km2 11 of 17 What would the ash be like from Yellowstone? A large cloud would rise 40-50km into the atmosphere and it would fall 15cm thick in the surrounding 1,000km 12 of 17 How long would it take for Yellowstone to affect the UK? Flights would be immediately suspended and ash would arrive within 5 days 13 of 17 What would be the effect of Yellowstone on global temperatures? World temperatures would fall between 12 and 15 degrees 14 of 17 What would be the effect of Yellowstone on the global climate? Parts of Europe, Asia and America would see constant snow cover for 3 years and monsoon rains would fail 15 of 17 What would be the effect of the climate shift? Nearly 40% of the earth's population suffering from starvation due to crop failure 16 of 17 How many supervolcanoes are there? There are only 7 in the world 17 of 17
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