What technology was used in the mid Atlantic Ridge?
These sonar records were the base maps for the dive expedition, and a team of geologists was assembled to be the first mid-ocean ridge divers using ArchimÈde in the summer of 1973.
What tool is used to discover the Mid Atlantic Ridge?
These charts were accurate only within about 20-50 m, but that was good enough for scientists to discover the mid-ocean ridge system in the Atlantic and Pacific Oceans. Echo sounders use different frequencies of sound to find out different things about the seafloor.
What confirmed the existence of the Mid Atlantic Ridge?
The existence of such a ridge was confirmed by sonar in 1925 and was found to extend around Cape Agulhas into the Indian Ocean by the German Meteor expedition.
What is the average plate movement at the Mid-Atlantic Ridge?
about 2.5 centimeters per year
The rate of spreading along the Mid-Atlantic Ridge averages about 2.5 centimeters per year (cm/yr), or 25 km in a million years. This rate may seem slow by human standards, but because this process has been going on for millions of years, it has resulted in plate movement of thousands of kilometers.
Why do oceans become deeper moving away from ridges?
Oceans become deeper moving away from ridges due to? thermal contraction of hot lithosphere.
What are the two types of mid-ocean ridges?
Two well-studied mid-ocean ridges within the global system are the Mid-Atlantic Ridge and the East Pacific Rise.
Why was the discovery of the Mid Atlantic Ridge important?
The discovery of this worldwide ridge system led to the theory of seafloor spreading and general acceptance of Wegener ‘s theory of continental drift and expansion in the modified form of plate tectonics. The ridge is central to the breakup of the hypothetical supercontinent of Pangaea that began some 180 million years ago.
How is the East Pacific Rise different from the Mid Atlantic Ridge?
Rapidly spreading ridges have a much more gentle slopes. The Mid-Atlantic Ridge, for instance, is a slow spreading center. It spreads 2-5 centimeters (.8-2 inches) every year and forms an ocean trench about the size of the Grand Canyon. The East Pacific Rise, on the other hand, is a fast spreading center.
What was the name of the failed arms of the Mid Atlantic Ridge?
The failed arms are called aulacogens, and the aulacogens of the Mid-Atlantic Ridge eventually became many of the large river valleys seen along the Americas and Africa (including the Mississippi River, Amazon River and Niger River ).
Where are the islands on the Mid Atlantic Ridge?
The islands on or near the Mid-Atlantic Ridge, from north to south, with their respective highest peaks and location, are: Northern Hemisphere (North Atlantic Ridge): Jan Mayen (Beerenberg, 2277 m (at 71°06′N 08°12′W / 71.100°N 8