Oceanic Geological Features Flashcards

1
Q

A guyot is:

A

An isolated underwater volcanic mountain with a flat top.

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

Where would you be most likely to find oil

and natural gas reserves?

A

Passive Margins

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

What is the approximate age of the oldest oceanic crust?

A

180 million years

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

New seafloor is created at:

A

Mid-ocean ridge or Mid-oceanic ridge

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

What is a distinguishing characteristic of the
seamounts of the Pacific Plate?

A

Conical Tops

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

Lying generally between the foot of a continental rise and a mid-ocean ridge,_______ are the most level parts of the deep ocean floor, usually found at depths between 3000 and 6000 m.

A

Abyssal Plains

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

What is the term for deep clefts descending from the
continental slope?

A

Submarine canyons

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

Ocean trenches are formed at ______ boundaries.

A

Oceanic-Oceanic Convergent

and

Oceanic-Continental Convergent

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

_____ _____, a coastal landform and a type of

dune system, are exceptionally flat or lumpy areas

of sand, that are parallel to the mainland coast.

A

Barrier Islands

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

A gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent is called a:

A

continental shelf

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

The drving force that causes crustal plates

to move is created by:

A

Convection cells within the mantle

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

What is a tombolo composed of?

A

Sand

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

Where are you most likely to find a fresh water lens?

A

Beneath a sandy oceanic island

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

What is the most abundant extrusive rock?

A

Basalt

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

Abyssal plains are usually found at depths between 3000 and ____ meters.

A

6000

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

The black sand beaches of Hawaii are

made of what type of rock?

16
Q

Guyots are also known as _______.

17
Q

A _____ _____ is an underwater mountain range, formed by plate tectonics.

A

Mid-ocean ridge or Mid-oceanic ridge

18
Q

Mid-ocean ridges are created at ______ boundaries.

19
Q

Abyssal plains cover more than __% of the Earth’s surface.

20
Q

The steep, seaward edge of the continental shelf is called the:

A

Continental slope

22
Q

A _____ _____ is the transition between oceanic and

continental lithosphere which is not an active

plate margin. It is constructed by sedimentation

above an ancient rift.

A

Passive margin

23
Q

An atoll is best defined as:

A

A ring-shaped reef, island, or chain

of islands formed of coral.

24
Q

Some ______ _______ are found as extensions to large rivers; however most of them have no such association.

A

Submarine Canyons

25
The Puerto Rico Trench is the deepest part of the Atlantic Ocean. How does this trench differ from the deep trenches in the Pacific Ocean?
It is located at a transform plate boundary
26
What is a tombolo?
A bar of sand joining an island to the mainland.
27
A \_\_\_\_\_\_\_ \_\_\_\_\_\_\_\_ is a steep-sided valley cut into the sea floor of the continental slope, sometimes extending well onto the continental shelf.
Submarine canyon
28
What is the Charles Darwin theory of atoll formation?
1. Formation of a fringing reef (on the side of a newly formed volcanic island) 2. Formation of a barrier reef (as the volcanic island sank) 3. Formation of an atoll