They rise abruptly from the abyssal plain to heights at least 3,300 feet (1,000 metres) above the ocean floor. Formed millions of years ago by extinct volcanoes and sediment erosion, sea canyons and seamounts are biodiversity hot spots — home to many rare and endangered species. Scientists estimate there are at least 100,000 seamounts higher than 1,000 meters around the world.

Seamounts, often rising hundreds of metres above surrounding seafloor, obstruct the flow of deep-ocean water. The area has been the subject of …

Media in category "Seamounts in the Atlantic Ocean" The following 5 files are in this category, out of 5 total. Atlantic Ocean Seamounts . It covers approximately 20 percent of Earth's surface and about 29 percent of its water surface area. In addition, seamounts rising into the ocean create obstacles that shape ocean currents and direct deep, nutrient-rich waters up the sloping sides of seamounts to the surface. Many are volcanic in origin. Atlantic Ocean Seamounts Most of the seamounts in the Atlantic basin are associated with hotspots beneath the slow moving African, Eurasian, North and South American plates. Today, President Obama designated the first marine national monument in the Atlantic Ocean, the Northeast Canyons and Seamounts Marine National Monument. Cadamosto Seamount; Caloosahatchee Seamount; Caryn Seamount; Concepción Bank; Condor seamount; Coral Patch Seamount; Corner Rise Seamounts By definition, seamounts are geological structures that rise more than 1,000 meters (3,300 feet) above the surrounding the seafloor, but most are much taller than that, rising upwards of 5,000 meters (16,400 feet), sometimes to within a few hundred meters of the ocean surface. Indian Ocean - Indian Ocean - Seamounts: Seamounts are extinct submarine volcanoes that are conically shaped and often flat-topped. Seamounts are often remnants of extinct volcanoes and come in a variety of shapes and sizes.

These provide hard foundations for deep-sea life to settle on and grow. The Northeast Canyons and Seamounts Marine National Monument is a unique and dramatic ocean area off the coast of New England.. Seamounts and knolls are largely unknown ocean oases Iron from Sahara dust helps fertilize Atlantic Ocean One result of rising ocean acidification: Anxious fish Very few seamounts form near the slow spreading Mid-Atlantic ridge although many small vocanoes form near the ridge axis. On September 15, President Obama designated the first marine national monument in the Atlantic Ocean, the Northeast Canyons and Seamounts Marine National Monument, using his authority under the Antiquities Act of 1906. An Atlas of Oceanic Internal Solitary Waves (February 2004) Atlantic Seamounts by Global Ocean Associates Prepared for Office of Naval Research – Code 322 PO 41 Atlantic Seamounts Overview Seamounts are large submarine mountains rising more than 1,000 m above the surrounding sea floor. While the retention of deep-water by seamounts is predicted from ocean … Most of the seamounts in the Atlantic basin are associated with hotspots beneath the slow moving African, Eurasian, North and South American plates. Very few seamounts form near the slow spreading Mid-Atlantic ridge although many small vocanoes form near the ridge axis. The Atlantic Ocean is the second largest of the world's oceans, with an area of about 106,460,000 square kilometers (41,100,000 square miles).