EPSC 201 Chapter Notes - Chapter 4: Flux Melting, Sulfur Dioxide, Breaking Free
12 Jun 2016
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Volcanic eruptions: the transfer of lava from the earths interior to the earths surface is a volcanic this melt is called lava when to reaches the earth surface. Lava has a temperature of 1000-1200 moves at a speed of up to 60kmper hour. Melt that exit bellow the surface is called magma freezing magma underground creates intrusiv rocks. When freezing happens on the earth surface its extrusive igneous rocks . Volcanic ash: pyroclastic debris, fine particles of glass that form when lava erupts into the air and instantly. This also happens when fore of eruption blasts apart pre-existing rocks. Pressure at great depths prevent atoms from breaking free from solid structure, decrease pressure permits melting. In the mantle when pressure decrease but the temperature stay magma forms. This kinds of melting is called decompression melting occurs when hot man rises to shallow depths. Melting as a result of addition of volatiles.
