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    Home - Nature - What are Underwater Mountain Ranges?

    What are Underwater Mountain Ranges?

    By Alex WilliamsJanuary 31, 2024
    JAN23 What are Underwater Mountain Ranges
    By Getty Images from Unsplash+

    We’ve all heard of mountain ranges, but have you ever heard of underwater mountain ranges? These mysterious and largely unexplored features of mountains under the ocean are just starting to be understood by scientists. Unlike mountains on land, which are formed by the collision of tectonic plates, underwater mountains are typically formed by volcanic activity. What do we know about them so far? And why should we care? Let’s begin and find it out.

    1. Are there Any Underwater Mountains?

    Yes, there are underwater mountain ranges, and they’re called seamounts. Seamounts are typically found in areas where the earth’s crust is thin, and the mantle is upwelling, such as mid-ocean ridges. Many seamounts are volcanic in origin, formed by magma eruptions from the earth’s interior. Seamounts can be quite large; Mauna Kea, for example, is a seamount that rises more than 10,000 meters from the seafloor to the summit of its island (although only about 4,207 meters of that is above sea level).

    Seamounts can be home to a variety of marine life, and they can provide important habitats for fisheries. Given their importance to the ecosystem, it’s important to protect seamounts from threats like pollution and overfishing. (See What is the Difference between a Mountain and a Plateau?)

    2. How many Underwater Mountains are there? How Many Mountains are Under the Sea?

    Scientists believe that there are approximately 100,000 seamounts located globally that exceed 1,000 meters in height. These mountains are typically found in deeper waters and provide a hard foundation for marine life to settle on and grow. While the exact number is unknown, this estimate provides a good starting point for further study. These numbers constantly change as new mountains are discovered and old ones eroded. Seamounts can be found worldwide, from the Arctic to the Indian Ocean. They vary greatly in size and shape, but all play an important role in the ecosystem. By better understanding these underwater mountains, we can gain a greater appreciation for the complexities of our planet.

    3. What are Underwater Mountain Called?

    Seamounts are mountains rising from the ocean floor but not above the water’s surface. They are typically formed by volcanic activity, and many seamounts are located near areas of high tectonic activity, such as mid-ocean ridges. Seamounts come in various sizes, some towering thousands of meters above the seafloor and others barely reaching above the waves. Although they seem like isolated features, seamounts often support a wide range of marine life, including corals, fish, and other invertebrates.

    4. What are Underwater Mountain Ranges?

    Mountain ranges that are located beneath the surface of an ocean are called underwater mountain ranges. The largest and best-known underwater mountain range is the Mid-Ocean Ridge, which extends for more than 65,000 km around the globe. This vast range includes such iconic features as the Hawaiian Islands and the volcano of Mount Fuji. Underwater mountain ranges are home to various unique ecosystems, including deep-sea corals and hydrothermal vents.

    5. What Mountain Range is Underwater?

    The mid-ocean ridge is a mountain range that runs along the bottom of the ocean. The mountain range is underwater and is formed by the movement of tectonic plates, which causes the Earth’s crust to rift and rise. The mid-ocean ridge is home to some of the deepest underwater canyons in the world. These canyons are formed by the flow of molten rock, which erodes the surrounding rocks and creates deep channels. The mid-ocean ridge is also home to various unique creatures, including giant squid and hammerhead sharks. This range provides critical habitat for these and other species. 

    6. Where are the Mountains Under the Ocean?

    JAN23 What are Underwater Mountain Ranges 1
    By Fellipe Ditadi from Unsplash+

    The tallest mountains on Earth are not where you might expect them to be. The truly towering peaks are all mountains under the ocean. Mauna Kea, a mountain in Hawaii, is more than 30,000 feet tall when measured from its base on the ocean floor. And Mount Logan, in Canada, is almost as high. Most are formed by volcanic activity. As lava erupts from the seafloor, it piles up around the vent, creating a steep-sided mound. Over time, as more lava flows forth and the volcano grows taller, it eventually breaks through the ocean’s surface to form an island. But seamounts can also be created simply by the movement of tectonic plates.

    7. Does the Pacific Ocean have a Underwater Mountain Range?

    Yes, the Pacific Ocean is home to several underwater mountain ranges, including the Mauna Kea near Hawaii. These mountains are formed when two plates of the earth’s crust collide, forcing one plate underneath the other. The resulting pressure and heat create magma, which then rises to the surface and forms a mountain. Mauna Kea is particularly interesting because it is taller than Mount Everest when measured from the sea floor to its peak.

    8. Is there an Underwater Mountain Taller than Everest?

    YES, Mauna Kea is a massive mountain that extends more than 30,000 meters above the seafloor. Its summit is nearly four kilometers taller than Mount Everest. Nevertheless, Mauna Kea is an impressive mountain, and its sheer size is mind-boggling.

    9. What is the Tallest Underwater Mountain Range?

    The mid-ocean ridge is considered the world’s longest mountain range. Stretching for more than 40,389 miles, it encircles the globe like a giant spine. The vast majority of the mid-ocean ridge is located in deep waters, making it one of the most inaccessible places on Earth. However, a few sections are shallow enough to be explored by divers. These areas are teeming with plant and animal life, providing a window onto an otherwise hidden world. Check out What are the Advantages of Mountains?

    10. What is a Submarine Mountain?

    A submarine mountain is an entirely underwater mountain. They are formed when tectonic plates collide and can be found in the oceanic and continental crust. Unlike other types of mountains, submarine mountains are very difficult to study due to their location. As a result, much of our understanding of these formations come from studying the geological features surrounding them. However, recent technological advances have allowed scientists to map the ocean floor in greater detail, providing new insights into the formation and evolution of submarine mountains.

    The mountain range underwater reminds us that there is still so much to learn about our world and that every day brings discoveries. (Also read What are Some Words to Describe a Mountain?)

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    alex1
    Alex Williams

    Alex Williams is a PhD student in urban studies and planning. He is broadly interested in the historical geographies of capital, the geopolitical economy of urbanization, environmental and imperial history, critical urban theory, and spatial dialectics.

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