FEATURES ON THE OCEANIC FLOOR Flashcards
1
Q
a chain of mountains underwater
A
mid-ocean ridge
2
Q
a submerged area that rims the land, beginning at the shoreline and gently sloping underwater to an average depth of about 430ft
A
continental shelf
3
Q
a moutain that breaks through the surface of the water.
A
island
4
Q
a flat area of the ocean floor, covered with sand, mud, and plant and animal remains
A
abyssal plain
5
Q
a steep-sided valley at the center of a mid-ocean ridge.
A
rift
6
Q
a long, narrow, steep-valley that forms the deepest parts of the ocean.
A
trench
7
Q
a steep drop-off from the continental shelf that plunges to depths of 2 1/4 miles.
A
continental slope
8
Q
underwater mountains formed by erupting volcanoes.
A
seamount
