2025 Geology 101 Exams 1 With 100 Questions And Correct
Answers Respectively/ Geol 101 Exams Latest 2025/ Geology 101
Final Exam (Brand New!)
A _____ is formed when magma intrudes between existing sedimentary layers. - ANSWER-Sill
If a limestone, a shale, and a sandstone are deposited in that order without interruption, which of
the following is true? - ANSWER-The limestone is the oldest and the succession is conformable.
What scenario requires a geologist to use the principle of cross-cutting relationships? - ANSWER-
A dike truncates layers in a sedimentary succession.
Which of the following is associated with an erosive surface? - ANSWER-A stream running across
an irregular surface
An igneous dike cuts across existing sedimentary layers and erupts at the surface, creating a layer of
basalt. The basalt, as well as all the layers below, are then cut by a fault. Which statement is true? -
ANSWER-The fault is the youngest because it cuts through all the sedimentary layers and basalt.
A sandstone contains inclusions of metamorphic rock. An igneous dike cuts both the sandstone and
inclusions. List the rocks from youngest to oldest. - ANSWER-igneous dike, sandstone,
metamorphic rock
If a sequence of sedimentary units is cut by a fault, what does the principle of cross-cutting
relationships tell a geologist? - ANSWER-All of the sedimentary units must have been deposited
and lithified before being cut by the fault.
Which of the following describes the principle of original horizontality? - ANSWER-Folded
sedimentary layers were originally laid down flat and later deformed.
, An undeformed sequence of sedimentary rocks is exposed in a large river canyon. Which two
principles would be demonstrated by the rocks? - ANSWER-principles of superposition and
lateral continuity
An igneous dike cuts through limestone, but not through the overlying sandstone. Which of the
following statements is most accurate? - ANSWER-First, the limestone was laid down, then
intruded by the igneous dike, and lastly the sandstone was deposited.
Following the deposition of a sequence of sedimentary rocks, which event is the first to occur to
produce an angular unconformity? - ANSWER-Deformation
A(n) __________ exhibits sedimentary layers that are parallel to each other above and below an
erosive surface - ANSWER-disconformity
Which of the following is an accurate description of a nonconformity? - ANSWER-younger
sedimentary strata overlie uplifted and weathered igneous or metamorphic rocks
The sedimentary layers above an erosive surface are __________ relative to all rocks present below
the surface. - ANSWER-younger
Which of the following is a common feature that all unconformities exhibit? - ANSWER-erosive
surface
What is the definition of relative dating? - ANSWER-putting events in order from first to last
Petrified wood is an example of what type of fossil preservation? - ANSWER-permineralization
Which conditions favor fossil preservation? - ANSWER-the organism is buried quickly
A worm burrow is an example of which type of fossilization? - ANSWER-trace fossil
Answers Respectively/ Geol 101 Exams Latest 2025/ Geology 101
Final Exam (Brand New!)
A _____ is formed when magma intrudes between existing sedimentary layers. - ANSWER-Sill
If a limestone, a shale, and a sandstone are deposited in that order without interruption, which of
the following is true? - ANSWER-The limestone is the oldest and the succession is conformable.
What scenario requires a geologist to use the principle of cross-cutting relationships? - ANSWER-
A dike truncates layers in a sedimentary succession.
Which of the following is associated with an erosive surface? - ANSWER-A stream running across
an irregular surface
An igneous dike cuts across existing sedimentary layers and erupts at the surface, creating a layer of
basalt. The basalt, as well as all the layers below, are then cut by a fault. Which statement is true? -
ANSWER-The fault is the youngest because it cuts through all the sedimentary layers and basalt.
A sandstone contains inclusions of metamorphic rock. An igneous dike cuts both the sandstone and
inclusions. List the rocks from youngest to oldest. - ANSWER-igneous dike, sandstone,
metamorphic rock
If a sequence of sedimentary units is cut by a fault, what does the principle of cross-cutting
relationships tell a geologist? - ANSWER-All of the sedimentary units must have been deposited
and lithified before being cut by the fault.
Which of the following describes the principle of original horizontality? - ANSWER-Folded
sedimentary layers were originally laid down flat and later deformed.
, An undeformed sequence of sedimentary rocks is exposed in a large river canyon. Which two
principles would be demonstrated by the rocks? - ANSWER-principles of superposition and
lateral continuity
An igneous dike cuts through limestone, but not through the overlying sandstone. Which of the
following statements is most accurate? - ANSWER-First, the limestone was laid down, then
intruded by the igneous dike, and lastly the sandstone was deposited.
Following the deposition of a sequence of sedimentary rocks, which event is the first to occur to
produce an angular unconformity? - ANSWER-Deformation
A(n) __________ exhibits sedimentary layers that are parallel to each other above and below an
erosive surface - ANSWER-disconformity
Which of the following is an accurate description of a nonconformity? - ANSWER-younger
sedimentary strata overlie uplifted and weathered igneous or metamorphic rocks
The sedimentary layers above an erosive surface are __________ relative to all rocks present below
the surface. - ANSWER-younger
Which of the following is a common feature that all unconformities exhibit? - ANSWER-erosive
surface
What is the definition of relative dating? - ANSWER-putting events in order from first to last
Petrified wood is an example of what type of fossil preservation? - ANSWER-permineralization
Which conditions favor fossil preservation? - ANSWER-the organism is buried quickly
A worm burrow is an example of which type of fossilization? - ANSWER-trace fossil
