Where is the ocean plateau?
The South Pacific region around Australia and New Zealand contains the greatest number of oceanic plateaus (see map). Oceanic plateaus produced by large igneous provinces are often associated with hotspots, mantle plumes, and volcanic islands — such as Iceland, Hawaii, Cape Verde, and Kerguelen.
How does a oceanic plateau form?
A widely accepted explanation is that oceanic plateaus are built by massive eruptions from the head of nascent thermal mantle plumes that rise from deep in the mantle to the surface (e.g., Duncan and Richards, 1991).
What is oceanic plateau in geography?
oceanic plateau, also called Submarine Plateau, large submarine elevation rising sharply at least 200 m (660 feet) above the surrounding deep-sea floor and characterized principally by an extensive, relatively flat or gently tilted summit.
Where is the largest oceanic plateau?
Oceanic plateaus are mafic igneous provinces commonly thought to derive from ascending mantle plumes. By far the largest, the Ontong Java Plateau (OJP) was emplaced ca. 120 Ma, with a much smaller magmatic pulse of ca. 90 Ma.
What rock forms oceanic plateaus?
What rock type forms oceanic plateaus? basalt.
Which plateau in the Indian Ocean is an example of oceanic plateau?
6 Oceanic Plateaus Among the best studied oceanic plateaus are the Ontong Java Plateau in the western equatorial Pacific, the Kerguelen Plateau in the southern Indian Ocean, and Shatsky Rise in the northwest Pacific.
What happens to oceanic plateaus?
The thick crustal sections of oceanic plateaus are difficult to subduct. As a result the upper crustal portions of oceanic plateaus are frequently accreted to continental margins and so have been an important contributor to crustal growth throughout Earth's history.
Where is telegraph plateau?
The region begins at around 51° north and runs from near the south of Ireland to Newfoundland in Canada north of the Great Banks for a distance of 1,400 miles (2,300 km). Its average depth was measured at 1,400 fathoms (2,600 m), and greatest depth 2,500 fathoms (4,600 m).