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I may be wrong, but the mid - ocean ridge is the longest mountain chain in the world, it is totally longer than the Andes. If you unwound it, it could go around the world 4 times! The rockies are NOT the longest, nor are the Andes 100% sure the Mid Ocean Ridge I'm ALWAYS rite (Answerboi111)

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15y ago
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13y ago

The Ocean Ridge (also known as Mid-ocean ridge), which runs more than 40,000 miles on the sea floor of five oceans is the longest mountain chain in the world. The longest mountain range on dry land is the Andes, which stretch 4300 miles through seven countries in South America.

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14y ago

Yes, and not only that, but the longest in the world, in the sea and on land.

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Q: Are the Rocky Mountains the longest mountain chain in the world?
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