MSCI 112 EXAM 2 QUESTIONS VERIFIED ANSWERS
A disconformity is a(n)
Select one:
A. erosional surface between horizontal layers of sedimentary rocks.
B. rock unit that does not contain fossils.
C. rock unit that is different from the units above or below it.
D. erosional surface between igneous and sedimentary rocks. - Answers - A
An undeformed sedimentary layer is ______ than the layer above and ______ than the
layer below.
Select one:
A. older; younger
B. younger; younger
C. older; older
D. younger; older - Answers - A
Unconformities are revealed by studying how surrounding layers relate to it. Which
layers are the relevant ones?
Select one:
A. the ones directly below
B. the ones directly above
C. those directly above and below
D. none of them - Answers - C
What is an unconformity?
Select one:
A. a period of deposition
B. a sequence of deformed rocks
C. a gap in the geologic record
D. a sedimentary layer of variable thickness - Answers - C
Which of the following is an erosion surface that separates two sets of sedimentary
layers with NONPARALLEL bedding planes?
Select one:
A. angular unconformity
B. disconformity
C. cross-bed
D. nonconformity - Answers - A
Which of the following is the best statement of the principle of original horizontality?
Select one:
A. Igneous intrusions form horizontal layers.
B. Sediments are deposited as horizontal layers.
A disconformity is a(n)
Select one:
A. erosional surface between horizontal layers of sedimentary rocks.
B. rock unit that does not contain fossils.
C. rock unit that is different from the units above or below it.
D. erosional surface between igneous and sedimentary rocks. - Answers - A
An undeformed sedimentary layer is ______ than the layer above and ______ than the
layer below.
Select one:
A. older; younger
B. younger; younger
C. older; older
D. younger; older - Answers - A
Unconformities are revealed by studying how surrounding layers relate to it. Which
layers are the relevant ones?
Select one:
A. the ones directly below
B. the ones directly above
C. those directly above and below
D. none of them - Answers - C
What is an unconformity?
Select one:
A. a period of deposition
B. a sequence of deformed rocks
C. a gap in the geologic record
D. a sedimentary layer of variable thickness - Answers - C
Which of the following is an erosion surface that separates two sets of sedimentary
layers with NONPARALLEL bedding planes?
Select one:
A. angular unconformity
B. disconformity
C. cross-bed
D. nonconformity - Answers - A
Which of the following is the best statement of the principle of original horizontality?
Select one:
A. Igneous intrusions form horizontal layers.
B. Sediments are deposited as horizontal layers.
