Guyot is:

Question

Question

This question was previously asked in

APPSC Group-1 (Prelims) Exam Official Paper-I (Held On: 17 Mar, 2024)

A mountain with pointed summit rising from the seafloor that does not reach the surface of the ocean.
A deep valley sometimes found cutting across the continental shelves and slopes.
A flat topped seamount showing the evidence of gradual subsidence through stages.
A low island found in the tropical oceans consisting of coral reefs surrounding a central depression.

Answer 1

The correct answer is A flat topped seamount showing the evidence of gradual subsidence through stages.

Key Points

A Guyot is a type of seamount with a flat top.
It shows evidence of gradual subsidence through stages, which indicates it was once above sea level before slowly sinking.
These structures are typically formed by volcanic activity.
The flat top of a Guyot is a result of erosion by waves, winds, and other erosive processes when it was above sea level.

Additional Information

Seamount
- A seamount is a mountain rising from the ocean seafloor that does not reach the surface (sea level).
- They are typically formed from extinct volcanoes that rise abruptly and are usually found rising from the seafloor to depths of 1,000-4,000 meters.
Submarine Canyon
- A submarine canyon is a steep-sided valley cut into the seabed of the continental slope, sometimes extending well onto the continental shelf.
- These canyons are formed by turbidity currents that carry sediments down the slope to the deep ocean floor.
Atoll
- An atoll is a ring-shaped coral reef, island, or series of islets surrounding a lagoon.
- They are typically found in warm ocean waters and are formed from the growth of coral reefs around the rim of a submerged volcanic island.