EES 115 Study Guide - Final Guide: Mid-Ocean Ridge, Bathymetry, Paleomagnetism
8 Jan 2019
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Answer: paleomagnetism of continental rocks, seafloor bathymetry (shape of seafloor, magnetic anomalies in seafloor rocks. Flow of the liquid outer core around the solid inner core generates the magnetic field. Two out of three lines of evidence relate to earths magnetic field. Shows elevation of oceanic ridges floor and bounce back. Magnetic anomalies in seafloor rocks: understand that the magnetic poles flip through various proof (like the mid oceanic range being symmetrical on both sides) Three ways a rock can melt: decompression melting, heat transfer. You can melt a rock by adding volatiles, and this is called "flux melting" Rising magma can increase the temperature of surrounding rocks and create even more melting (heat transfer melting) Solid- solidified mineral crystals are carried in the melt. Liquid- the melt itself is compose of mobile ions. We classify igneous rocks based on how much silica is present compared to other chemical elements. Initial source rock compositions: partial melting, assimilation, magma mixing.
