Civil and Environmental Engineering 3322A/B Chapter Notes - Chapter 02: Pearson Education, Mudstone, Diorite
15 Dec 2015
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2. 1 describe the inter-relationships in the geologic cycle among magma, different types of rocks, and soil. Igneous rocks are formed by the cooling and solidification of magma at depth and lava at the earth"s surface. Pyroclastic ejection of magma leads to the formation of soil and sedimentary rocks. Metamorphosis of igneous rocks or sedimentary rocks produces metamorphic rocks. The weathering of igneous, sedimentary and metamorphic rocks produces soils, which can be turned into sedimentary rocks through induration. Finally, magma can be produced through the melting of igneous or metamorphic rocks. Diorite is a hard igneous rock that is very strong and thus provides excellent support for structures. Shale is a sedimentary rock derived from clay. It has weak bedding planes and may be prone to shear failure along these planes. Thus, in general, diorite would provide much support for the building. Granite generally has excellent engineering properties and would require less support than mudstone.
