Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Day 1: Board Exam > GEOPSEA EXAM 1 > Flashcards

GEOPSEA EXAM 1 Flashcards

1
Q

The major kinematic reorganization of the Pacific Plate at around 43 Ma involves _ rotation with respect to hotspots.

A

50 degrees clockwise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The absolute velocity of the Pacific plate is:

A

80 mm/yr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The Pacific plate subducts under the Philippine Sea Plate along:

A

Bonin-Marianas-Yap trench system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The deepest trench in this planet is:

A

Marianas trench

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The submarine plateaus in the West Philippine Basin are:

A

benham rise, urdaneta plateau, oki-daito ridges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

the trend of the Central Basin Fault is

A

WNW-ESE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The opening of the Parece Vela-Shikoku and the Marianas Basin involves what mechanism?

A

retreat of subducting slab

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The Palau-Kyushu Ridge separates which two basins?

A

parece vela-shikoku and west philippine basin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

this ridge splits into two branches towards the south as the West and East Marianas Ridges:

A

Izu-Bonin Ridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which of the following volcanic arcs is presently active?

A

East mariana ridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The Philippine Sea Plate/Eurasia rotation pole is located

A

NE of Japan

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The relative displacement rate of Philippine Sea Plate and Eurasia is:

A

7.0 cm/yr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The directional change of the Philippine Sea Plate between 4 and 6 Ma involves_rotation

A

45 degrees counterclockwise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which of the following collision zones involves arc-continent interaction?

-taiwan
-moluccas
-philippine trench
-east luzon trough

A

Taiwan

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The Sulu-Zamboanga Arc separates:

A

Sulu Sea and Celebes Sea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

A back-arc basin is formed:

A

behind a subduction zone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Which of the following oceanic basins have been studied as an example of a trapped basin?

-south china sea
-marianas
-parece vela-shikoku
-west philippine basin

A

west philippine basin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The term Philippine Mobile Belt was first defined by which author?

A

Gervasio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which of the following DOES NOT indicate that the Philippine trench is young?

-deep Benioff zone
-well developed accretionary prism
-southern termination poorly known
-none of the above

A

deep Benioff zone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

This is the morphologic expression of the subduction of the oceanic crust of the South China Sea under the Luzon arc

A

Manila Trench

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

This fault links the Cotabato Trench with the Negros Trench

A

Cotabato Trench

22
Q

In which of the following islands are pre-Cretaceous metamorphic rocks NOT likely to be found?

-north palawan
-mindoro
-panay
-davao oriental

A

Davao Oriental

23
Q

The collision of the Halmahera and Sangihe is an example of:

A

arc-arc collision

24
Q

The islands in the Philippine Mobile Belt originated from

A

sub-equatorial regions

25
The following are pre-Cretaceous metamorphic rocks, EXCEPT: -Caramay Schist -Halcon Metamorphic COmplex -Tungauan Schist -none of the above
none of the above
26
The age of ophiolitic rocks is based on the age of the: a. pillow basalts b. pelagic sediments c. sheeted dikes d. layered gabbro
b. pelagic sediments
27
The oldest known magmatic rocks in the Philippines are found in Cebu Island. This rock is a
Diorite
28
The Aroroy Diorite is an intrusive body found in
Masbate
29
This is an intrusive body found in the island of Panay
Sara Diorite
30
Mount Apo, was proposed to have formed from:
partial melting of detached slab
31
Bud Dajo is an active volcano in
Sulu
32
Which of the following sedimentary basins is not traversed by the Philippine Fault: -southern luzon-bicol basin -mindoro basin -agusan-davao basin -ilocos-central luzon basin
mindoro basin
33
The Philippine Fault was designated by various terms by different authors. One of which is Repetti, who named this fault as:
Master Fault
34
What is the mode of displacement of the Philippine Fault?
Left-Lateral
35
The March 17, 1973 southern Luzon earthquake, of the Philippine Fault, had an epicenter located in
Ragang Gulf
36
The northern segment of the Philippine Fault is characterized by:
transpressional regime
37
This feature corresponds to the NNE-SSW alignment of active volcanoes such as Taal, Banahaw, Makiling, and maars of Laguna province.
Macolod Corridor
38
Which of the following faults is characterized by normal faulting? -sindangan fault -cotabato fault -tablas lineament -legaspi lineament
cotabato fault
39
This fault is a tectonic boundary between the Palawan-Mindoro microcontinental block and western edge of the Philippine Mobile Belt
Tablas Lineament
40
The Tablas Lineament is characterized by what type of displacement?
right-lateral
41
the basement rock of the Southern Pacific Cordillera is the
Barcelona Formation
42
This constitutes the basement rocks of the Central Pacific Cordillera. It is characterized by andesitic flows and pyroclastic basement believed to be of Eocene age?/
Anoling Andesite
43
This unit refers to the Holocene volcanic deposits of Lake Leonard in Davao. This volcanic activity is manifested as domes, plugs, flows and pyroclastic rocks of andesitic to dacitic composition
Amacan Volcano Complex
44
This formation was named by San Jose Oil Company for the exposures along a river in Prosperidad, Agusan del Sur. An angular unconformity separates this from the underlying formation.
Wawa Formation
45
This represents the well-defined rhythmic interbeds of indurated thin sandstones and shales of Early Miocene age in the core of the Kilagden Anticline of Asuncion, Davao del Norte
Kabagtican Formation
46
At 50 Ma, there was a south-dipping subduction north of the Philippine Sea Plate which is the _ . Its subduction may have driven the spreading of the West Philippine Sea.
Northern New Guinea Plate
47
In the plate reconstruction by Hall, during which time did the Palawan-Mindoro microcontinent start rifting from the eastern edge of the Eurasian Plate?
35 Ma
48
Which of the following significant events happened 5 Ma ago?
Luzon arc came into collision with Taiwan
49
Spreading in the West Philippine-Celebes Sea basin had ceased:
30 Ma ago
50
The East Philippine Arc was formed by the subduction of _ under _ .
Indo-Australian plate, proto-South China Sea

Day 1: Board Exam (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions