Earth Sciences 2240F/G Lecture Notes - Lecture 7: Subduction, Magma Chamber, Amphibole
17 Dec 2017
School
Department
Course
Professor
Document Summary
There is a lot of good that arises from volcanic eruptions, volcanic rocks decompose very quickly to form very rich agricultural soil. A large proportion of the world"s richest copper, gold and silver deposits are associates with deep magma. Volcanoes are testaments to earths huge internal energy. Magma is defined as molten rock, and may be a mix of hot liquid, gasses, and scattered mineral crystals. When magma spills out onto the earth"s surface it produces hot lava. All rocks made my volcanoes are called igneous rocks. Viscosity is defined as that property that provides resistance to flow. The higher the temperature that more fluid something is. The next most important factor to influence viscosity is chemical composition: in particular the content of two elements silicon (si) and oxygen (o, the less of these two elements the more fluid is an object.
