EESA06H3 Chapter Notes - Chapter 3: Olivine, Isostasy, Pyroxene
17 Jul 2013
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Document Summary
Rocks are simply naturally occurring aggregates of minerals. Minerals are naturally occurring homogeneous solid formed through geological processes; has a characteristic of chemical composition; highly ordered atomic structure and has specific physical properties. Igneous rocks are those made up of cool magma and are called as born of fire. The silicate ion forms tetrahedral composed of a central silicon ion surrounded by 4 oxygen ions. The silicate ion is the basic building block of all silicate mineral and 90% minerals are silicates. Quartz is common in ign, metam and sed rocks. It is also found in makeup and car paint. Calcite: the mineral class is carbonates and it is common in sedimentary rocks. It glows in the dark and it will fizz in acid. Streak color when mineral group to a fine powder on streak plate. Hardness diamond is the hardest and talc is the softest. Crystal shapes eg: pyrite forms some well-shaped cubes.
