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Question 1
Sedimentary rocks can form:
Correct Answer:
all of the above are true
Question 2
Choose the proper listing of detritus terms, going from smallest to largest of the words offered
Correct Answer: mud, silt, sand
Question 3
Which statement is true?
Pieces of broken rock produced by physical weathering are collectively called detritus
Correct Answer:
Pieces of broken rock produced by physical weathering are collectively called detritus
Question 4
Which is not a "soil term"?
Correct Answer: arkose
Question 5
A nonmarine clastic sedimentary rock composed of angular fragments surrounded by matrix is:
Correct Answer: breccia
Question 6
A clastic sedimentary rock with clay and silt-sized grains that breaks in thin sheets is called:
Correct Answer: shale
Question 7
Which term has nothing to do with the mineral calcite?
Correct Answer: chert
Question 8
The organic sedimentary rock that is composed of mud-sized particles and partially decayed organic matter derived from plankton and algae remains is:
Correct Answer: oil shale
Question 9
Which statement is true?
Correct Answer: All of the above are true statements
Question 10
Ripple marks on a bedding plane:
Correct Answer: could suggest an ancient stream bed or a seashore
Question 11
What is the most logical past environment to have produced a deposit consisting of layers of well-sorted sandstone with cross beds several meters high?
Correct Answer: sand dunes
Question 12
What is the most logical past environment to have produced a deposit consisting of layers of unsorted, unstratified sedimentary clasts, clay-sized to boulder-sized?
Correct Answer:
glacial valley
Question 13
What is the most logical past environment to have produced a deposit consisting of very little sand and mud, but instead lots of broken-up carbonate shells of marine organisms?
Correct Answer: shallow-water carbonate area
Question 14
The structure that may form where a stream enters a lake:
Correct Answer: all of the above are true statements
Question 15
Which of the following sedimentary features is the surest indicator that the past environment there was subaerial (under air), not submarine (underwater)?
Correct Answer: mud cracks
Question 16
Sedimentary rocks form only at or near Earth's surface, never at great depths
Correct Answer: True
Question 17
The words weathering and erosion are synonyms; they can be used interchangeably
Correct Answer: False
Question 18
Graywacke and conglomerate are examples of well-sorted rocks; shales and fine-grained sandstone are examples of poorly sorted rocks
Correct Answer: False
Question 19
A rock with large, angular fragments and lots of feldspar is classified as immature; a rock with smaller, rounded grains and not much feldspar is classified as mature
Correct Answer: True
Question 20
The formation of dolostone, due to the introduction of magnesium into limestone, is an example of diagenesis
Correct Answer: True
Question 21
The presence of redbeds indicates the sediments lithified in water and this caused the iron to rust
Correct Answer: False
Question 22
Diagenesis and metamorphism both alter the texture and mineral composition of rock; metamorphism is the more extreme process
Correct Answer: True
Question 23
A sequence of sedimentary beds, distinctive enough to be recognized as a unit called a stratigraphic formation, gives clues to the past environment that produced it
Correct Answer: True
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