EPSC 201 Study Guide - Final Guide: Plagioclase, Mantle Wedge, Oceanic Trench
11 Jul 2013
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This causes lines of islands to be formed. This can tell you the past movement of the plates, and how it changed direction if the line segments change directions. You can also tell how fast the plates are moving, by looking at the spacing in between the islands and the age of the islands by rock samples. India de nitely went over a hot spot while it was migrating north. We know this by identical rocks found at the hot spot and rocks in india. The hot spots give a lot of information about plate trajectories. They come and go over a time period of tens of millions of years: explain the statement silicate minerals comprise covalent and ionic bonds. The bonds are much stronger then ionic bonds. Most rocks are formed through silicate mineral in which silicon bonding to oxygen is one of the key building blocks.
