EPSC 201 Study Guide - Final Guide: Thrust Fault, Subduction, Himalayas
11 Jul 2013
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Epsc201 2004 final exam review section 5&6: describe the mineralogical changes that occur during the chemical weathering of granite. Granite is much less susceptible to chemical weathering, compared to marble. This is easily observed in cemeteries, where headstones are made of both. Granite will preserve the names much longer, whereas marble weathers very easily. The reaction of marble with acid rain is widely known. Any exposure to acid will dissolve the marble. This is seen in europe, where any buildings of marble are badly weathered due to acid rain from the early. The acid responsible for this weathering is carbonic acid. This was produced in the industrial revolution from burning coal. This is because the oxygen is electronegative, and has a tiny net negative charge. This gives the hydrogen"s a net positive charge. The molecule behaves like a mini bar magnet. The plus hydrogen"s are directed towards the green chlorine (negative) ions, and help it dissolve.
