Is Plateau Oin The Ocean Floor

A flood basalt is the result of a giant volcanic eruption or series of eruptions that covers large stretches of land or the ocean floor with basalt lava flood basalt provinces such as the deccan traps of india are often called traps after the swedish word trappa meaning stairs due to the characteristic stairstep geomorphology of many associated landscapes. However the magma that fills the fissure does not flood extensively over the ocean floor and stack up to form a topographic high. Yet today at the top of the colorado plateau the kaibab limestone is found at elevations up to 9 000 feet.

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They tend to be flat.

Is plateau oin the ocean floor.

Mid ocean ridge eruptions make large plains on the sea floor. Most oceanic plateaus were named early in the 20th century prior to the invention of sonic sounding and many of these features have been shown by modern. Submarine canyon and fan c. A frequent misconception is that the ridge is a build up of volcanic materials.

A history of ocean floor mapping and dating. The kerguelen plateau is another submerged island or small continent in the southern ocean south of the indian ocean and about 1 400 miles long. There are 184 oceanic plateaus covering an area of 18 486 600 km 2 7 137 700 sq mi or about 5 11 of the oceans. Match the name for each feature using the choices provided a.

These plateaux may take millions of years to form. Ocean floor relief and oceanic oozes. 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. Passive margin with relatively wide continental shelf j.

The lava of these plateaux are thin and runny. It was last above water about 20 million years ago created by the kerguelen hotspot which currently exists under the kerguelen heard and mcdonald islands above the plateau. An oceanic or submarine plateau is a large relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Learn vocabulary terms and more with flashcards games and other study tools.

Below is a virtual ocean with several features depicted on the ocean floor. The ocean floor is a mysterious place that marine geologists and oceanographers have struggled to fully grasp. The south pacific region around australia and new zealand contains the greatest number of oceanic plateaus see map. How did these sea floor rocks attain such high elevations.

The ridge is a high area compared to the surrounding seafloor because of the lift from the convection current below. Overtime a number of fissure eruptions in the same area can build up a high plateau. Oceanic fracture zone i. Lava makes the plateau bigger and higher with each eruption.

The uplift of the colorado plateau the kaibab limestone the uppermost layer of rock at grand canyon was formed at the bottom of the ocean. In fact scientists have mapped more of the surface of the moon mars and venus than the surface of our ocean. Start studying 7th 6.

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