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APSC 151 Midterm Questions And Answers
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Which of the following sedimentary rocks is usually biochemical in origin? a) bedded salt b) conglomerate c)sandstone d) wacke e) limestone ~ e What platy, parallel, mineral grains are the most visual aspect of foliated metamorphic rocks? a) carbonates b) quartz c) cocoliths d...

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  • August 5, 2024
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  • 2024/2025
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APSC 151 Midterm Questions
And Answers

Which of the following sedimentary rocks is usually biochemical in origin?


a) bedded salt


b) conglomerate


c)sandstone


d) wacke


e) limestone


✓✓✓✓~ e




What platy, parallel, mineral grains are the most visual aspect of foliated

metamorphic rocks?




a) carbonates


b) quartz


c) cocoliths

,d) micas


e) feldspars


✓✓✓✓~




Lava flows are typically finer grained than intrusive igneous rocks. Why?




a) The extrusive magma, because it is deep below the surface, cools very slowly

producing very small mineral grains.




b) Intrusive magma is cooler because it is well insulated by the surrounding

rock.




c) The extrusive magma cools quickly so the mineral grains do not have time to

grow.




d) Intrusive magma flows onto the surface and cools very slowly, allowing small

mineral grains to grow.

, e) the lava weathers before it can cool


✓✓✓✓~ c




Under the application of uniform, confining pressure, rocks will generally

________.




a) increase in density but retain primary bedding orientations




b) increase in porosity




c) grow or crystallize a new set of low density hydrous minerals




d) shatter and turn into a breccia




e) bend, fold, buckle, and shear to make typical deformed metamorphic textures


✓✓✓✓~ e




Which common rock forming minerals exhibit a perfect single basal cleavage?

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