EESA06H3 Lecture : EESA06 Notes Jan 30.docx
11 Mar 2012
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A mineral has a crystallized substance and is a building block of rocks. Outcrops: is a geological term referring to the appearance of bedrock or superficial deposits exposed at the surface of the earth. Geophysics the use of instruments to image what is down in the earth. To get information about the layers at depth. In a contaminated site for example, we need to know how far the contaminants have spread. We start with magma, it is the source or primary product. Then it melts to produce igneous rock etc. A rock is a naturally formed, consolidated material composed of grains of one or more minerals. A mineral is a naturally occurring, in organic, crystalline solid that has a definite chemical composition. The most important group are the silicate minerals containing silicon and oxygen and accounts for 90% of all minerals. A few minerals dominate e. g. -quarts (silica = sio2 = silicon plus oxygen.
