Earth Sciences 2240F/G Lecture 7: Earth science 7
20 Jan 2018
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1. 0 intro: good in volcanoes, rock decomposes for good agriculture, richest copper gold and silver deposits, geothermal energy provided by the heat of the magma. Dissolved water : when there is not enough to bind to you get exsolved water which forms bubbles when the magma cools, the cooler the magma the more exsolved water. Si and volatile-rich than the original magma: rhyolite: most modified, higher si even higher volatile content. 3. 0 volcano settings: 90% associated with tectonic plates, 10% most erupted from hot spots marking tops of mantle plumes. 3. 2 subduction zones: the ring of fire: active volcanic belt around the pacific ocean up the coast of south america, all along the west coast of. Lake nyos, cameroon, west africa: the lake filled a previous volcanic crater, people didn"t aknowledge that under was still magma, the. Armero in columbia: a city wiped out from lahars was rebuilt again to be wiped out again.
