In geology there are 3 main rock types. Metamorphic and Igneous are two of them. What is the third?
Sedimentary
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In which state did a massive volcanic eruption occur in the US at Mount St Helens in 1980, with fifty-seven lives lost, despite a comprehensive evacuation programme?
Washington State
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The name of which type of rock derives from the Latin for fire?
Igneous
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Geothermal power is generated using heat energy from what?
Rocks in the Earth's crust
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