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Geology/Geography/Oceanography/Atmospheric Sciences
Earth Physical Geology
Quiz 2: Minerals: The Building Blocks of Rocks
In Silicate Minerals, Cleavages Occur ________
Question 77
Multiple Choice
In silicate minerals, cleavages occur ________. A)across the dominant silicate structures B)in between the dominant silicate structural units C)in random directions, unrelated to the silicate framework D)in between mineral crystals
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Q 78
Garnet, a common hard metamorphic mineral used for abrasives, has an internal crystal structure most similar to which other silicate mineral? A)augite B)biotite C)olivine D)plagioclase feldspar
Q 79
Which one of the following is a sodium and calcium feldspar with twinning striations? A)orthoclase B)microcline C)plagioclase D)sanidine
Q 80
Small, parallel grooves (twinning striations)are visible on cleavage surfaces and characteristic of which mineral? A)olivine B)quartz C)plagioclase feldspar D)hornblende
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