The Oceans - Chapter 1: Features of the Ocean Basin Floor Flashcards

1
Q

Long, relatively narrow features that represent the deepest part of the ocean

A

deep-ocean trenches

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

Trenches are the sites where moving crustal plates are destroyed as they ____

A

plunge back into the mantle

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

What type of activity is associated with trench regions?

A

Igneous

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

Trenches in the open ocean are often paralleled by

A

Volcanic island arcs

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

These are incredibly flat features that are likely the most level places on earth

A

Abyssal plains

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

The monotonous topography of abyssal plains will occassionally be interrupted by ____

A

protruding summit of buried volcanic structure

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

What do abyssal plains consist of?

A

thick accumulation of sediment, deposited on the low rough portions of ocean floor

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

True or false: tubidite deposits are interbedded with sediments composed of minute clay-sized particles that continuously settle on the ocean floor

A

True

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

Where are abyssal plains more widespread?

A

Where there are no deep ocean trenches adjacent to the continents

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

Since the Atlantic Ocean has ______ to act as traps for sediments, it has more extensive abyssal plains

A

fewer trenches

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

These dot the ocean floors and are isolated volcanic peaks that may rise hundreds of meters above the surrounding topography

A

seamounts

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

The submerged flat topped seamounts that occur when islands gradually sink as the moving plate slowly carries them from the oceanic ridge area

A

Guyots

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