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Unformatted text preview: or fragments of several coarse detrital rock specimens. Notice that they are not crystals. a. Observe the material surrounding the grains or fragments in the rock specimen closely with a hand lens or microscope. The material is (course, fine). Circle your answer. b. Write a brief description of the detrital rock specimen you have examined. 14. Observe your specimens. . Two of the minerals that often comprise the grains of detrital sedimentary rocks are quartz, a hard (hardness = 7) mineral with a glassy luster, and clay, a soft, fine mineral that consists of microscopic platy particles. The difference in appearance and hardness of quartz and clay is helpful in distinguishing them....
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This note was uploaded on 04/03/2011 for the course PHYS 114 taught by Professor Comptonw during the Summer '10 term at Purdue University-West Lafayette.
- Summer '10