(1) What is a Continental Slope?
(2) Give a brief definition of an Abyssal Plain.
(3) How are Ocean Trenches formed?
(4) Give the formation of a Structural Plain.
(5) Give the formation of Laccustrine Plains.
Answers
Explanation:
A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water known as a shelf sea. Much of these shelves has been exposed during glacial periods and interglacial periods. The shelf surrounding an island is known as an insular shelf.
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 metres and 6,000 metres. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth's surface.
In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.
Structural Plains
These plains are mainly formed by the upliftment of a part of the sea floor or continental shelf. ... The structural plains may also be formed by the subsidence of areas
Lacustrine plains are plains formed when lakes filled with sediments are drained. There are several reasons why drainage might occur, but in all cases the water in the lake is lost, leaving behind a level land of sediments. The resulting plain is an area of flat land which is often rich in fine-grained sediments.