The most well known would be the Hawaiian island mountain range caused by underwater volcanic activity.
Underwater.
Mid Oceanianic Ridge
The longest mountain chain is the Mid-Oceanic Ridge, which runs under all 7 oceans and spans from around California to North of Greenland. It is estimated to be 49,700 miles long. The longest above seal level mountain range is the Andes Mountain Range, which runs down the west border of South America. It is estimated to be 4,300 miles long. The tallest mountain range is the Himalayas with 16 peaks above 26,000 ft, the highest of which is Mt. Everest at 29,035ft.
The longest is the chain of the Rockies and Andes that goes almost from pole to pole. The highest is the Himalayas that has Everest and K2. The tallest single mountain is Hawaii, but most of it is under water.
The longest mountain chain is the Mid-Oceanic Ridge, which runs under all 7 oceans and spans from around California to North of Greenland. It is estimated to be 49,700 miles long. The longest above seal level mountain range is the Andes Mountain Range, which runs down the west border of South America. It is estimated to be 4,300 miles long.
The longest mountain chain is the Mid-Oceanic Ridge, which runs under all 7 oceans and spans from around California to North of Greenland. It is estimated to be 49,700 miles long. The longest above seal level mountain range is the Andes Mountain Range, which runs down the west border of South America. It is estimated to be 4,300 miles long.
The Gotthard Base Tunnel goes under the Swiss Alps, specifically the Saint-Gotthard Massif, which is part of the Lepontine Alps. It is the longest and deepest railway tunnel in the world, passing through the heart of the Swiss mountain range.
The longest mountain range in the world is the Andes, which stretches for about 7,000 kilometers (4,300 miles) along the western edge of South America. The Mid-Atlantic Ridge is also extensive, extending approximately 16,000 kilometers (10,000 miles) under the ocean, but it is primarily underwater. The Rocky Mountains, while significant, are shorter at about 4,800 kilometers (3,000 miles). Thus, the Andes holds the title as the longest mountain range overall.
the mid ocean ridge and its not only the longest under water but it is the longest of all of the ranges. iceland is part of it that comes out of the water and its accuallly taller then everest NEW FROM BAYBOB: if you unwound the mid ocean ridge, it would go around the earth 4 times!
The Andes - over 4,000 miles! There are longer ones if you include mountain ranges under water...
The Pacific Rise is the mountain range under the Pacific Ocean. It parallels the coast of North and South America.
It is the thickest under mountains ranges.
The crust is generally thicker under a mountain range compared to under the sea. This is because mountain ranges are formed by the collision of tectonic plates, which can result in the crust being pushed up and folded, leading to its thickening. In contrast, the crust under the ocean is thinner due to the process of seafloor spreading where new crust is constantly being created at mid-ocean ridges.