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Angular grains are usually the result of mechanical weathering like frost wedging. Although solubility 800 o 600 Concentration, ppm SiO2 Amorphous silica 400 Quartz 200 0 0 100 200 Temperature, °C 300 400 Figure 12.15 Graph showing the solubility of quartz and amorphous silica in water as a function of temperature. Most sedimentary rocks become cemented together by minerals and chemicals or are held together by electrical attraction; some, however, remain loose and unconsolidated. In addition Melvin (1991) noted that there is a direct comparison of oil volumes to evaporate volumes throughout geologic time (p.367).

Pages: 400

Publisher: Elsevier Science; 1 edition (December 4, 2009)

ISBN: 0444530258

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