Ninetyeast Ridge Formation Uncovered
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Ninetyeast RidgePhys Org
•Moving 'hotspot' created world's longest straight underwater mountain belt, researchers find
90% Informative
The Ninetyeast Ridge is the Earth 's longest straight underwater mountain chain.
It stretches 5,000 km along the Indian Ocean's 90-degree east longitude and nearly matches the length of North America's Rocky Mountains .
High-precision dating of minerals extracted from the ridge shows it formed between 83 and 43 million years ago as a massive volcanic chain, with its oldest sections in the north, near India .
Discovery revises the estimated age and origin of the ridge.
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