Earth Science Geology, the Environment, and the Universe

Section 2: Relative-Age Dating

Self-Check Quizzes-English

1
Which principle of geology can be used to determine the relative age of rock layer M?
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A)cross-cutting relationships
B)inclusions
C)uniformitarianism
D)superposition
2
Which rock unit shown in the figure below is the youngest?
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A)Q
B)P
C)M
D)L
3
If a horizontal Devonian shale directly overlies a horizontal Ordovician limestone, what is the surface between the strata called?
A)an erosional surface
B)a nonconformity
C)a disconformity
D)an angular unconformity
4
What geologic principle states that in an undisturbed rock sequence, the oldest rocks are on the bottom and the youngest are on the top?
A)uniformitarianism
B)cross-cutting relationships
C)original horizontality
D)superposition
5
What does a disconformity in a sedimentary rock sequence represent?
A)a gap in the rock record
B)a volcanic eruption
C)duplicated strata in the rock record
D)a flood event
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