ESC. 2000 Chp 5 Quiz.docx - Question1 1/1pts FEEDBACK:

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Question 1 1 / 1 pts A thick soil profile indicates that    the slope under the soil is likely to be quite steep.    the soil likely formed over a long period of time.    not enough time has passed for leaching to occur.    the O-zone is probably not well-developed. FEEDBACK: Soils tend to be thicker when they form over a long period of time and on a surface with a shallower slope. During the leaching process, water transfers material  from one soil horizon to a lower horizon and would not necessarily change the total  thickness of the soil profile. The thickness of the O-zone depends on environmental  conditions, not on the overall thickness of the soil profile.   Question 2 1 / 1 pts A very fine-grained clastic sedimentary rock is called a    shale.    breccia.    sandstone.    conglomerate. FEEDBACK: Shale is very fine-grained. Sandstone is medium-grained. Breccia and  conglomerate are coarse-grained.
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  Question 3 1 / 1 pts Coal is an example of which type of sedimentary rock?    Biochemical    Clastic    Chemical    Organic FEEDBACK: Coal is an example of an organic sedimentary rock. Coal forms from plant  debris that has been lithified into sedimentary rock.   Question 4 1 / 1 pts Coral reefs that are preserved as sedimentary rocks are classified as    sandstones.    shales.    limestones.    conglomerates. FEEDBACK: The organisms that make up a coral reef form their shells from calcium  carbonate. When these shells accumulate, they can harden to limestone, a biochemical  sedimentary rock. Sandstones, shales, and conglomerates are clastic sedimentary  rocks.
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  Question 5 1 / 1 pts Finely laminated shale was likely formed from sediments deposited    by a migrating sand dune.    on a beach by strong waves.    in a lake.    at a glacier's terminus. FEEDBACK: Finely laminated shale would form from mud deposited in the quiet waters  of a lake. A sand dune or beach environment would have more energy and would not  deposit mud. A wide variety of sediment sizes would be deposited immediately at a  glacier's terminus, not just mud.   Question 6 1 / 1 pts Geologists find a series of graded beds, one on top of another. What events could have  produced this set of structures?    Migrating sand dunes    Repeated evaporation from a saline lake    Repeated turbidity currents    Constant movement of ocean waves
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FEEDBACK: Turbidite deposits are formed by sediment-laden submarine avalanches.  Because the avalanche, or turbidity current, loses energy over time, large grains fall out  first, followed by smaller grains. This pattern of deposition produces graded beds. Over 
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  • Fall '15
  • JudyMcIlrath
  • pts, Conglomerate

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