LSU GEOL 1001 Final Exam
Questions with Answers Updated Pass
Guaranteed | Verified Questions
LSU GEOL 1001 Final Exam Questions with | Comprehensive
Examination
LSU GEOL 1001 Final Exam Questions with Answers
Updated Pass Guaranteed actual exam preparation document
with verified questions, complete answers, and focused
INTRODUCTION
This document is an important and very helpful preparation
resource for LSU GEOL 1001 Final Exam Questions with
Answers Updated Pass Guaranteed. Every item uses a focused
exam stem, four response options, a keyed response, and a clear
rationale, making it easier to understand the subject, spot
distractors, and build real exam confidence.
Page 1
, Question 1
A seismic station records P-wave and S-wave arrivals from an earthquake. The
S-wave arrives 8 minutes after the P-wave. Using the standard travel-time
graph, if the distance to the epicenter is 6000 km, what is the approximate
S-wave velocity?
A. 3.5 km/s
B. 4.5 km/s
C. 6.0 km/s
D. 8.0 km/s
Correct Answer: B - 4.5 km/s
RATIONALE
The S-P time difference of 8 minutes (480 s) corresponds to a distance
of 6000 km. The S-wave travel time is obtained from the graph: for
6000 km, S-wave travel time is approximately 1333 s (22.2 min).
Thus S-wave velocity = 6000 km / 1333 s 4.5 km/s. P-wave velocity
would be higher (~6.5 km/s), and the other options are typical for
different Earth materials.
Question 2
In a sequence of sedimentary rocks, a geologist observes a gradual transition
from shale to sandstone to conglomerate upward. This vertical change most
likely records:
A. A marine transgression
B. A marine regression
C. A period of tectonic quiescence
D. Diagenetic alteration of a single protolith
Correct Answer: B - A marine regression
Page 2
, RATIONALE
An upward coarsening sequence (shale->sandstone->conglomerate)
indicates progradation of coarser clastics into a basin, typical of a
regression as sea level falls or sediment supply increases.
Transgression would show upward fining. Tectonic quiescence would
produce uniform lithology, and diagenesis does not create such
large-scale vertical facies changes.
Question 3
Which of the following best explains why the Himalayas continue to rise
despite the collision of two continental plates that began ~50 Ma?
A. Continental crust is too buoyant to subduct deeply, causing crustal
thickening and uplift.
B. The Indian plate is still subducting at a steep angle, generating
compressional forces.
C. Erosion rates are low, so isostatic rebound dominates.
D. Mantle plumes beneath the region push the crust upward.
Correct Answer: A - Continental crust is too buoyant to subduct
deeply, causing crustal thickening and uplift.
RATIONALE
When two continental plates collide, neither subducts deeply because
continental crust is buoyant. The crust shortens and thickens,
producing high mountains and a plateau. Continued convergence
causes ongoing uplift. B is incorrect because subduction is shallow or
absent; C is false because erosion is significant; D is not applicable as
no plume is involved.
Question 4
A clastic sedimentary rock contains abundant feldspar and angular quartz
grains with poor sorting. The most likely depositional environment is:
A. Aeolian dune
Page 3
, B. Glacial till
C. Shallow marine shelf
D. Meandering river point bar
Correct Answer: B - Glacial till
RATIONALE
Glacial till is deposited directly by ice, resulting in poor sorting,
angular clasts, and minimal chemical weathering, preserving feldspar.
Aeolian dunes are well-sorted and rounded; shallow marine shelf is
well-sorted and rounded; point bars are moderately sorted and
rounded. Thus B is correct.
Question 5
Which mineral assemblage is characteristic of a high-grade metamorphic rock
derived from a shale protolith?
A. Chlorite + muscovite + quartz
B. Biotite + garnet + staurolite
C. Sillimanite + potassium feldspar + quartz
D. Kaolinite + quartz + hematite
Correct Answer: C - Sillimanite + potassium feldspar + quartz
RATIONALE
High-grade metamorphism of shale (pelitic) yields sillimanite,
K-feldspar, and quartz, often with garnet. Chlorite and muscovite are
low-grade; biotite-garnet-staurolite is medium-grade; kaolinite and
hematite are diagenetic or low-temperature minerals. Thus C is
correct.
Question 6
A geologist maps a normal fault with a strike of N20°E and a dip of 60°SE.
The fault plane separates a hanging wall of sandstone from a footwall of
limestone. Which block moved down relative to the other?
Page 4
Questions with Answers Updated Pass
Guaranteed | Verified Questions
LSU GEOL 1001 Final Exam Questions with | Comprehensive
Examination
LSU GEOL 1001 Final Exam Questions with Answers
Updated Pass Guaranteed actual exam preparation document
with verified questions, complete answers, and focused
INTRODUCTION
This document is an important and very helpful preparation
resource for LSU GEOL 1001 Final Exam Questions with
Answers Updated Pass Guaranteed. Every item uses a focused
exam stem, four response options, a keyed response, and a clear
rationale, making it easier to understand the subject, spot
distractors, and build real exam confidence.
Page 1
, Question 1
A seismic station records P-wave and S-wave arrivals from an earthquake. The
S-wave arrives 8 minutes after the P-wave. Using the standard travel-time
graph, if the distance to the epicenter is 6000 km, what is the approximate
S-wave velocity?
A. 3.5 km/s
B. 4.5 km/s
C. 6.0 km/s
D. 8.0 km/s
Correct Answer: B - 4.5 km/s
RATIONALE
The S-P time difference of 8 minutes (480 s) corresponds to a distance
of 6000 km. The S-wave travel time is obtained from the graph: for
6000 km, S-wave travel time is approximately 1333 s (22.2 min).
Thus S-wave velocity = 6000 km / 1333 s 4.5 km/s. P-wave velocity
would be higher (~6.5 km/s), and the other options are typical for
different Earth materials.
Question 2
In a sequence of sedimentary rocks, a geologist observes a gradual transition
from shale to sandstone to conglomerate upward. This vertical change most
likely records:
A. A marine transgression
B. A marine regression
C. A period of tectonic quiescence
D. Diagenetic alteration of a single protolith
Correct Answer: B - A marine regression
Page 2
, RATIONALE
An upward coarsening sequence (shale->sandstone->conglomerate)
indicates progradation of coarser clastics into a basin, typical of a
regression as sea level falls or sediment supply increases.
Transgression would show upward fining. Tectonic quiescence would
produce uniform lithology, and diagenesis does not create such
large-scale vertical facies changes.
Question 3
Which of the following best explains why the Himalayas continue to rise
despite the collision of two continental plates that began ~50 Ma?
A. Continental crust is too buoyant to subduct deeply, causing crustal
thickening and uplift.
B. The Indian plate is still subducting at a steep angle, generating
compressional forces.
C. Erosion rates are low, so isostatic rebound dominates.
D. Mantle plumes beneath the region push the crust upward.
Correct Answer: A - Continental crust is too buoyant to subduct
deeply, causing crustal thickening and uplift.
RATIONALE
When two continental plates collide, neither subducts deeply because
continental crust is buoyant. The crust shortens and thickens,
producing high mountains and a plateau. Continued convergence
causes ongoing uplift. B is incorrect because subduction is shallow or
absent; C is false because erosion is significant; D is not applicable as
no plume is involved.
Question 4
A clastic sedimentary rock contains abundant feldspar and angular quartz
grains with poor sorting. The most likely depositional environment is:
A. Aeolian dune
Page 3
, B. Glacial till
C. Shallow marine shelf
D. Meandering river point bar
Correct Answer: B - Glacial till
RATIONALE
Glacial till is deposited directly by ice, resulting in poor sorting,
angular clasts, and minimal chemical weathering, preserving feldspar.
Aeolian dunes are well-sorted and rounded; shallow marine shelf is
well-sorted and rounded; point bars are moderately sorted and
rounded. Thus B is correct.
Question 5
Which mineral assemblage is characteristic of a high-grade metamorphic rock
derived from a shale protolith?
A. Chlorite + muscovite + quartz
B. Biotite + garnet + staurolite
C. Sillimanite + potassium feldspar + quartz
D. Kaolinite + quartz + hematite
Correct Answer: C - Sillimanite + potassium feldspar + quartz
RATIONALE
High-grade metamorphism of shale (pelitic) yields sillimanite,
K-feldspar, and quartz, often with garnet. Chlorite and muscovite are
low-grade; biotite-garnet-staurolite is medium-grade; kaolinite and
hematite are diagenetic or low-temperature minerals. Thus C is
correct.
Question 6
A geologist maps a normal fault with a strike of N20°E and a dip of 60°SE.
The fault plane separates a hanging wall of sandstone from a footwall of
limestone. Which block moved down relative to the other?
Page 4
