Geology Board Exam Reviewer - GOP The Philippines: A Complex Plate Boundary Quiz Set G

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 31, 2020. Thank you.

Geology of the Philippines

The Philippines: A Complex Plate Boundary

Set G

 

1. A conduct of marine geophysical survey with GLORIA (Geological Long-Range Inclined Asdic) and an offshore fieldwork in Halmahera Island appear to confirm the southward propagation of this geologic structure towards the Moluccas Collision Zone.

a. Philippine Mobile Belt

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

2. It represents an arc-continental collision.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

3. Dating of these rocks is essentially based on the ages of pelagic sediments covering them.

a. Metamorphic rocks

b. Ophiolites and ophiolitic rocks

c. Magmatic rocks and active volcanic arcs

d. Sedimentary basins

 

4. This is the morphological expression of the westward subduction of the Philippine Seas Plate under the eastern Philippine Arc.

a. Philippine Mobile Belt

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

5. This category of metamorphic formations is represented by those rocks that can be found in North Palawan, Mindoro, Panay, and neighboring islands belonging to the Palawan-Mindoro Microcontinent.

a. pre-Cretaceous metamorphic rocks of continental origin

b. Cretaceous metamorphic rocks of insular arc affinity

 

6. The thickness of the sedimentary fill of this east-dipping subduction zone varies between 250 and 2,600 m.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

7. According to McCaffrey (1991), this active collision represents a present-day example of the emplacement of ophiolites by slivers (obduction).

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

8. The displacement rate of the Philippine Sea Plate is _______________.

a. 5 cm/yr

b. 6 cm/yr

c. 7 cm/yr

d. 8 cm/yr

 

9. This trench appears to be linked with the Negros Trench by a left-lateral strike slip feature cutting across the Zamboanga Peninsula.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

10. The two corresponding active volcanic arcs of this collision consequently collided as well.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

11. A bathymetric link between this subduction zone and the Manila Trench is represented by a shallow trough that passes northeast off Palawan Island.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

12. A double-vergent arc-arc collision.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

13. There is a corresponding active volcanic arc on the western margin of Mindanao for this trench.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

Answer key is here. I advise that you check it out after finishing all sets.

Thanks.

Geology Board Exam Reviewer - GOP The Philippines: A Complex Plate Boundary Quiz Set F

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 24, 2020. Thank you.

Geology of the Philippines

The Philippines: A Complex Plate Boundary

Set F

 

1. The Philippines is marked by this/these active collision zone/s ______________________.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. all of the above

 

2. These metamorphic formations are distributed sporadically within the whole archipelago.

a. pre-Cretaceous metamorphic rocks of continental origin

b. Cretaceous metamorphic rocks of insular arc affinity

 

3. In pre-1980 literature, these rocks were previously referred to as ultramafic complexes or undifferentiated Cretaceous-Paleogene basement.

a. Metamorphic rocks

b. Ophiolites and ophiolitic rocks

c. Magmatic rocks and active volcanic arcs

d. Sedimentary basins

 

4. This geologic structure is generally considered young and probably created not earlier than 5 Ma.

a. Manila Trench

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

5. This is the group of land masses that apparently originated from sub-equatorial regions.

a. Philippine Mobile Belt

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

6. This collision passes into the Manila Trench-Luzon Arc system.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

7. This metamorphic group is essentially basic to ultrabasic in character.

a. pre-Cretaceous metamorphic rocks of continental origin

b. Cretaceous metamorphic rocks of insular arc affinity

 

8. An active volcanic chain is traceable for this subduction zone, with Canlaon Volcano as an example.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

9. The _______________ is an actively deforming zone between two active subduction systems.

a. Philippine Mobile Belt

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

10. This usually occurs with pre-Tertiary metamorphic rocks and represent basement on which magmatic arcs were developed.

a. Metamorphic rocks

b. Ophiolites and ophiolitic rocks

c. Magmatic rocks and active volcanic arcs

d. Sedimentary basins

 

Answer key is here. I advise that you check it out after finishing all sets.

Thanks.

 

Geology Board Exam Reviewer - GOP The Philippines: A Complex Plate Boundary Quiz Set E

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 24, 2020. Thank you.

Geology of the Philippines

The Philippines: A Complex Plate Boundary

Set E

 

1. This is an elongated bathymetric depression that reaches depths of 5,100 m in the latitude of Manila.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

2. It represents an active orogenic belt resulting from the collision of the western edge of the Philippine Sea Plate and the continental margin of Eurasia.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

3. This lithologic unit in the Philippines can be divided into two categories of, (1) pre-Cretaceous of continental origin and, (2) Cretaceous of insular arc affinity.

a. Metamorphic rocks

b. Ophiolites and ophiolitic rocks

c. Magmatic rocks and active volcanic arcs

d. Sedimentary basins

 

4. The origins and mode of emplacement of these rocks are still the subject of controversy.

a. Metamorphic rocks

b. Ophiolites and ophiolitic rocks

c. Magmatic rocks and active volcanic arcs

d. Sedimentary basins

 

5. It represents the morphological expression of the subduction of the oceanic crust of the South China Sea under the Luzon Arc.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

6. A structure that plays significant role in the Neogene tectonic evolution of the Philippine Archipelago.

a. Philippine Mobile Belt

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

7. A well-developed accretionary prism exists for this east-dipping subduction zone.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

8. Characterized by the transformation of the subduction of the South China Sea Plate under the Luzon Arc.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

9. The age of the rocks belonging to this metamorphic group does not extend beyond Paleogene.

a. pre-Cretaceous metamorphic rocks of continental origin

b. Cretaceous metamorphic rocks of insular arc affinity

 

10. The corresponding volcanic arc of this structure does not exist.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. East Luzon Trough

Answer key is here. I advise that you check it out after finishing all sets.

Thanks.

 

Geology Board Exam Reviewer - GOP The Philippines: A Complex Plate Boundary Quiz Set D

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 24, 2020. Thank you.

Geology of the Philippines

The Philippines: A Complex Plate Boundary

Set D

 

1. A forearc basin is developed between the accretionary prism of this subduction zone and Luzon Island.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

2. The volcanic arc corresponding to this geologic structure can be traced from Bicol to Leyte but unclear in Mindanao.

a. Manila Trench

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

3. The ________________ enters into collision with the central portion of the Philippine Mobile Belt.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

4. The _____________ volcanic arc is linked to the Negros Trench.

a. Luzon

b. East-Philippine

c. Negros-Panay

d. Sulu-Zamboanga

e. Cotabato

 

5. The termination of this east-dipping subduction zone passes into the collision zone of Mindoro-Panay.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

6. The Philippines is generally interpreted as a collage of _____________________.

a. insular arcs

b. ophiolitic suites

c. continental rocks of Eurasian affinity

d. all of the above

 

7. The subduction along this trench is young as shown by a poorly developed Benioff Zone.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

 

8. The western slab of this collision dives down to a depth of more than 600 km, one of the deepest in the world.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

9. The ______________ volcanic arc is associated with the Philippine Trench

a. Luzon

b. East-Philippine

c. Negros-Panay

d. Sulu-Zamboanga

e. Cotabato

 

10. This is an east-dipping subduction zone opposite of the East Luzon trough.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

Answer key is here. I advise that you check it out after finishing all sets.

Thanks.

Geology Board Exam Reviewer - GOP The Philippines: A Complex Plate Boundary Quiz Set C

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 24, 2020. Thank you.

Geology of the Philippines

The Philippines: A Complex Plate Boundary

Set C

 

1. This collision was initiated within Miocene time, right after the cessation of the accretion of the South China Sea oceanic crust.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

2. These metamorphic formations include the Caramay Schist, Halcon, Buruanga and Romblon Metamorphic Complexes and Tungauan Schist.

a. pre-Cretaceous metamorphic rocks of continental origin

b. Cretaceous metamorphic rocks of insular arc affinity

 

3. The ______________ volcanic arc corresponds to the Manila Trench

a. Luzon

b. East-Philippine

c. Negros-Panay

d. Sulu-Zamboanga

e. Cotabato

 

4. A west-dipping subduction zone, Lewis and Hayes (1983) proposed that this is a nascent subduction zone propagating northwards.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. East Luzon Trough

 

5. The Philippine Mobile Belt (PMB) is an actively deforming zone created between the two plates of ________________.

a. Philippine Sea Plate, Pacific Plate

b. Philippine Sea Plate, Indo-Australian Plate

c. Philippine Sea Plate, Eurasian Plate

d. Eurasian Plate, Pacific Plate

 

6. The start of this collision is associated with the kinematic reorganization of the Philippine Sea Plate at around 4 Ma.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

7. This collision was initiated within Miocene time, right after the cessation of the accretion of the South China Sea oceanic crust.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

8. A late Miocene age was determined for the start of this collision.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

9. The oldest known rocks of this type are found in Cebu Island and is dated Late Cretaceous.

a. Metamorphic rocks

b. Ophiolites and ophiolitic rocks

c. Magmatic rocks and active volcanic arcs

d. Sedimentary basins

 

10. This is rifted from the Asian mainland during Late Cretaceous-Late Eocene time.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

Answer key is here. I advise that you check it out after finishing all sets.

Thanks.

 

 

 

 

Geology Board Exam Reviewer - GOP The Philippines: A Complex Plate Boundary Quiz Set B

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 24, 2020. Thank you.

Geology of the Philippines

The Philippines: A Complex Plate Boundary

Set B

 

1. The Manila Trench-Luzon Arc system passes into the __________________.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

2. This metamorphic group is characterized petrographically by the abundance of silica.

a. pre-Cretaceous metamorphic rocks of continental origin

b. Cretaceous metamorphic rocks of insular arc affinity

 

3. The ______________ arc is well defined only from Bicol to Leyte but cannot be traced in Eastern Mindanao.

a. Luzon

b. East-Philippine

c. Negros-Panay

d. Sulu-Zamboanga

e. Cotabato

 

4. An east-dipping subduction zone that runs parallel to the western coasts of Panay and Negros Islands.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

5. The southern closure of this structure is still poorly known.

a. Philippine Mobile Belt

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

6. The boundary of between the _________________ and the eastern margin of the ______________ is a complex system of subduction zones, collision zones and marginal sea basin openings.

a. Philippine Sea Plate, Pacific Plate

b. Philippine Sea Plate, Indo-Australian Plate

c. Philippine Sea Plate, Eurasian Plate

d. Eurasian Plate, Pacific Plate

 

7. This represent a continent-arc collision.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

8. The rotation and spreading of this plate during Eocene to Miocene times is the reason for the present position of the Philippine Mobile Belt.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

9. These lithologic units represent the pre-Tertiary basement of the Philippines.

I. Metamorphic rocks

II. Ophiolites and ophiolitic rocks

III. Magmatic rocks and active volcanic arcs

IV. Sedimentary basins

 

a. I & II

b. II & III

c. III & IV

d. I & III

 

10. The presence of these that cannot be associated with any of the active subduction zones indicates the evolution of the Philippine archipelago through continuous volcanic activity throughout the Cenozoic.

a. Metamorphic rocks

b. Ophiolites and ophiolitic rocks

c. Magmatic rocks and active volcanic arcs

d. Sedimentary basins

Answer key is here. I advise that you check it out after finishing all sets.

Thanks.

 

 

 

Geology Board Exam Reviewer - GOP The Philippines: A Complex Plate Boundary Quiz Set A

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 24, 2020. Thank you.

Geology of the Philippines

The Philippines: A Complex Plate Boundary

Set A

 

1. A linear feature located northeast of Luzon Island.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. East Luzon Trough

 

2. This is a poorly known east-dipping subduction zone which seems to disappear southwards into the Moluccas Sea.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

3. The corresponding arcs (Sangihe and Halmahera) of this collision are presently separated by at least 100 km.

a. Taiwan

b. Mindoro-Panay

c. Moluccas Sea

d. Palawan Microcontinental Block

 

4. The ______________ arc is formed by the Sulu Trench.

a. Luzon

b. East-Philippine

c. Negros-Panay

d. Sulu-Zamboanga

e. Cotabato

 

5. This subduction zone consumes the oceanic crust of the Sulu Sea Basin.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

6. A poorly understood feature but appears in most maps as a transform fault.

a. Manila Trench

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

7. The _______________ is surrounded by subduction zones with opposing polarities.

a. Philippine Mobile Belt

b. Philippine Fault

c. Philippine Trench

d. East Luzon Trough

 

8. This metamorphic group is characterized geographically by its restricted distribution in the western central Philippines.

a. pre-Cretaceous metamorphic rocks of continental origin

b. Cretaceous metamorphic rocks of insular arc affinity

 

9. The _______________ arc is related to the Cotabato Trench.

a. Luzon

b. East-Philippine

c. Negros-Panay

d. Sulu-Zamboanga

e. Cotabato

 

10. The subducted oceanic slab of this east-dipping subduction zone does not seem to exceed 100 km in depth.

a. Manila Trench

b. Cotabato Trench

c. Philippine Trench

d. Negros Trench

 

Answer key is here. I advise that you check it out after finishing all sets.

Thanks.

GOP: Regional Geodynamic Setting Quizzes Answer Keys

As promised, here are the links for the answer keys:

Quiz Set A

Quiz Set B

Quiz Set C

Quiz Set D

Quiz Set E

Quiz Set F

Will be uploading more reviewers soon.

Hasta la proxima.

Resource Material - Geology of the Philippines

Hi, guys! 

We're done with the Regional Geodynamic Setting quizzes. That's it for this portion of GOP.

As far as Filipino geologists are concern, our tectonics is one of the most active in the world (I'm kinda copying the intro of that chapter from Doc Au's book, Geology of the Philippines, 2nd Edition, lol. But there's no other way to describe our tectonics other than, "ACTIVE").

All of the questions from the quizzes came from that chapter alone. Sorry for all those plates question. When I was reviewing for the boards, I didn't memorized any of that. I should have, though. Haha.

Here are other resource materials from the internet:

For other types of Sedimentary Basins, [click here]

Helpful material for the difference between magnitude scales of volcanic eruptions [click here]

Next week, quizzes about Chapter 2 of GOP will be uploaded [The Philippines: A Complex Plate Boundary]

Hasta la proxima!

Geology of the Philippines Quiz Set F (Geology Reviewer)

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 17, 2020. Thank you.

Geology of the Philippines Quiz Set F

 

1. This divides the Sulu Sea Basin into two.

a. Cagayan de Sulu Ridge

b. Sulu-Zamboanga Arc

c. Celebes Sea Basin

d. North Palawan Block

 

2. The interaction between the Philippine Sea Plate and the southeastern edge of the Eurasian Plate created the _______________.

a. Bonin-Marianas-Yap Trench System

b. New Guinea insular arcs

c. Philippine Archipelago

d. Marianas Trench

 

3. Since ____, the mid-oceanic ridge separating the two continental blocks of India and Australia has become inactive.

a. 50 Ma

b. 43 Ma

c. 5 Ma

d. 3 Ma

 

4. This ridge is considered as a relict volcanic arc of Middle Eocene to Oligocene age.

a. Izu-Bonin

b. Palau-Kyushu

c. West-Marianas

d. Oki-Daito

 

5. The Pacific plate subducts under the ______________ along the Japan Trench.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

6. The oceanic basins of the Philippine Sea Plate are separated from each other by submarine ridges with axes generally oriented ___________.

a. N-S

b. E-W

c. NE-S

d. NW-S

 

7. This plate is composed of both continental and oceanic crust.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

8. The Pacific plate subducts under the ______________ along the Bonin-Marianas-Yap Trench System.

a. insular arcs

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

9. A poorly known portion on the southern extremity of the Philippine Sea Plate where oceanic accretion appears to be occurring.

a. Parece Vela – Shikokiu Basin

b. Marianas Basin

c. West Philippine Basin

d. Ayu Basin

 

10. This plate is colliding with a complex zone of insular arcs which have been active since the Mesozoic.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

 

Geology of the Philippines Quiz Set E (Geology Reviewer)

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 17, 2020. Thank you.

Geology of the Philippines Quiz Set E

 

1. This plate is entirely composed of an oceanic lithosphere created 150 million years ago.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

2. This structure represents an extinct mid-oceanic spreading ridge, cut transversely by a series of parallel faults oriented N-S.

a. Central Basin Fault

b. Kyushu-Palau Ridge

c. Oki-Daito Ridge

d. Parece Vela Rift

 

3. The marginal basins at the southern boundary of the Eurasian and Philippine Sea Plate are represented by ______________________.

a. South China Sea

b. Sulu Sea

c. Celebes Sea

d. all of the above

 

4. It occupies around 50% of the Philippine Sea Plate.

a. Parece Vela – Shikokiu Basin

b. Marianas Basin

c. West Philippine Basin

d. Ayu Basin

 

5. This ridge defines the eastern limit of the Shikoku Basin and represents the volcanic arc of the presently active Bonin Trench.

a. Izu-Bonin

b. Palau-Kyushu

c. West-Marianas

d. Oki-Daito

 

6. This is composed of volcanic material dated 14.7 Ma and corresponds to a volcanic arc that was active until the end of early Miocene.

a. Cagayan de Sulu Ridge

b. Sulu-Zamboanga Arc

c. Celebes Sea Basin

d. North Palawan Block

 

7. The absolute velocity of this plate with respect to hot spots is at 107 mm/yr.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

8. This ridge traverses the longer diagonal of the Philippine Sea Plate for around 2,500 km.

a. Izu-Bonin

b. Palau-Kyushu

c. West-Marianas

d. Oki-Daito

 

9. The boundary between the Eurasian Plate and the Philippine Sea Plate in the south is basically composed of marginal basins that successively opened in several phases within _____________ times.

a. Paleogene

b. Eocene

c. Oligocene

d. Neogene

 

10. This plate is developed at the western edge of the Pacific plate.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

Geology of the Philippines Quiz Set D (Geology Reviewer)

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 17, 2020. Thank you.

Geology of the Philippines Quiz Set D

 

1. The Ocean Drilling Program (ODP) 124 indicates that the _______________ was formed in an open ocean setting with a basalt characterized as N-MORB.

a. Cagayan de Sulu Ridge

b. Sulu-Zamboanga Arc

c. Celebes Sea Basin

d. North Palawan Block

 

2. The ___________ is basically composed of well individualized ocean basins with an average depth of 4 to 6 km.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

3. The rotation of this plate from a NNW to a WNW trajectory is presently manifested in the change of orientation of the Hawaiian-Emperor Islands volcanic chain.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

4. This plate undergone a major kinematic reorganization at around 43 Ma, which involves a 50-degree clockwise rotation with respect to hotspots.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

5. There are four major ridges in the Philippine Sea Plate. Which is not included?

a. Izu-Bonin

b. Palau-Kyushu

c. West-Marianas

d. Oki-Daito

 

6. The Philippine Sea Plate subducts under the ____________ in the east.

a. Bonin-Marianas-Yap Trench System

b. Nankai Trenches

c. Ryukyu Trenches

d. Philippine Trench System

 

7. This bounds the Philippine archipelago to the NW.

a. South China Sea

b. Sulu Sea

c. Celebes Sea

d. Palawan Microcontinental Block

 

8. This represents an oceanic crust and its magnetic anomalies indicate an Eocene age.

a. Cagayan de Sulu Ridge

b. Sulu-Zamboanga Arc

c. Celebes Sea Basin

d. North Palawan Block

 

9. This plate is basically continental in nature except for the marginal basins along its edges.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

10. This ridge divides the West Philippine Basin from the Parece Vela – Shikoku Basin.

a. Izu-Bonin

b. Palau-Kyushu

c. West-Marianas

d. Oki-Daito

 

Geology of the Philippines Quiz Set C (Geology Reviewer)

As I can't really commit to a 100-item practice set, I'll do quizzes of specific course subject of Geology.
Answer key will be provided on May 17, 2020. Thank you.

Geology of the Philippines Quiz Set C

 

1. The opening of the Other Basins is usually associated with a/an ____________ migration of the subduction of the Pacific Plate under the Philippine Sea Plate.

a. northward

b. eastward

c. westward

d. southward

 

2. This plate has no magnetic anomalies that would allow for the computation of its kinematics.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

3. This is a volcanic arc considered to be in its solfataric stage.

a. Cagayan de Sulu Ridge

b. Sulu-Zamboanga Arc

c. Celebes Sea Basin

d. North Palawan Block

 

4. This plate is presently subducting under the Eurasian Plate along the Java Trench.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

5. The absolute velocity of this plate with respect to hot spots is at 80 mm/yr.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

6. A 125 km-long rupture that stretches from Dingalan, Aurora to Kayapa, Nueva Vizcaya is a result of a surface wave magnitude (Ms) ______ earthquake from the strike-slip movements along the NW segment of the Philippine Fault Zone and the Digdig Fault splay.

a. 7.5

b. 7.6

c. 7.7 (this is the moment magnitude, Mw)

d. 7.8 (The July 16, 1990 Luzon Earthquake Rupture; Phivolcs Article)

 

7. The trapped oceanic basins and back-arc basin models are generally distinguished as probable models for the origin of the _________________.

a. Parece Vela – Shikokiu Basin

b. Marianas Basin

c. West Philippine Basin

d. Ayu Basin

 

8. This plate is surrounded by subduction zones.

a. Pacific Plate

b. Eurasian Plate

c. Indo-Australian Plate

d. Philippine Sea Plate

 

9. This basin has a proposed two stages of opening (Pautot and others, 1986), where the first stage is between 32 and 17 Ma along an E-W axis followed by a second stage between 20 and 17 Ma along a NE-SW axis.

a. South China Sea

b. Sulu Sea

c. Celebes Sea

d. none the above

 

10. It could have split off from a previously larger Molucca Sea Plate.

a. Cagayan de Sulu Ridge

b. Sulu-Zamboanga Arc

c. Celebes Sea Basin

d. North Palawan Block