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Engineering Geology

Engineering Geology - geomuseu

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E n g i n e e r i n g G e o l o g y<br />

Figure 1.1<br />

Approximate mineral compositions of the more common types of igneous rocks, e.g. granite approximately 40% orthoclase,<br />

33% quartz, 13% plagioclase, 9% mica and 5% hornblende (plutonic types without brackets, volcanic equivalents in brackets).<br />

Figure 1.2<br />

Dyke on the south side of the Isle of Skye, Scotland.<br />

2

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