'Open Lecture' Quiz #3 your name:_____________________________ ID#__________________Of the three basic classes of rock, __sedimentary____ rocks are by far the least common in theEarth, comprising only a small fraction of the upper crust. When they are buried to more than 10or 15 km, they commonly change to ___metamorphic____ rocks. The changes in sediments afterdeposition, called ___diagenesis____ includes both the recrystallization of less stable mineralsinto more stable ones and ___lithification___ (in which a rock is compacted under pressure andits grains are ____cemented______ together by ions from the pore fluids). Sedimentary rockscan be thought of as either chemical (once having been __in solution_____) or detrital (havingbeen transported as __solid particles__). The main components of detrital sediment (clay, quartz,feldspars, micas) are, not surprisingly, what you get from eroding rocks of ___granitic________composition (and from their weathering products).Particles (clasts) are defined by their size (boulder, ___cobble___, pebble, granule, sand,silt, and clay).
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Sedimentary rocks, 15 km, _____Bowen, ___breccia____, ____Chemical_______ sedimentary rocks