GEO 110 Chapter Notes - Chapter 4: Continental Crust, Oceanic Crust, Plate Tectonics
25 Jul 2016
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Document Summary
The inner core is made of two minerals; iron and nickel, and its solid. Beyond the core you have the mantel layer, upper and lower mantle, makes accounts for 80% of volume of air. Then the asthenosphere, ranges from 400 to 700km, and above that is the lithosphere(zone of rock) which is 60 to 400 km depending on the land its found. Continental crust: made up of a combination of mineral (sial), silica, and aluminium, lighter in weight, it is relatively warmer and lighter than the oceanic crust. It has great viscosity, so it ows very slowly, if there is an eruption of a volcano the materials from the continental crust have great resistance, and solidi es within a short time. Oceanic crust: denser and cooler, made up of ma c composition, means that high amount of magnesium, and iron, it has very low viscosity, very uid. Minerals found within is the oceanic crust is gabbros and basalt.
