The four main types of sandstone are illustrated in Fig. 5.8. Which is which, and why?
Answer to relevant QuestionsContrast the histories of a well-rounded, well-sorted quartz sandstone [Fig. 5.8(a)] and a poorly sorted graywacke with angular grains of various compositions [Fig. 5.8(d)].The precipitation of calcite can be illustrated by this equation: Ca(HCO3)2 = CaCO3 + H2O + CO2 What would cause this reaction to move to the right (i.e., to precipitate calcite) if the seawater were saturated with respect ...Why do geologists study sandstones under the microscope? (See Figs. 5.8 and 5.9.)How is most dolomite formed?Some sequences of sedimentary rocks are tens of thousands of meters thick. Does this thickness indicate that some great catastrophe occurred?
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