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Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. Oceanic trenches are prominent, long, narrow topographic depressions of the ocean floor. They are typically 50 to 100 kilometers (30 to 60 mi) wide and 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic ...
An oceanic trench is a type of convergent boundary at which two oceanic lithospheric slabs meet; the older (and therefore denser) of these slabs flexes and subducts beneath the other slab. Oceanic lithosphere moves into trenches at a global rate of about a tenth of a square meter per second.
Beaufort's Dyke, highlighted in blue, on a 1969 Admiralty chart Map showing the size and location of Beaufort's Dyke, in red, between the coasts of Northern Ireland and Scotland. Beaufort's Dyke is a natural glacial formed trench within the North Channel between Northern Ireland and Scotland. The dyke is 50 kilometres (25 nautical miles) long ...
Map of the Pacific Ocean during European Exploration, circa 1702–1707 (from Pacific Ocean) Image 76 Universalis Cosmographia , also known as the Waldseemüller map , dated 1507, was the first map to show the Americas separating two distinct oceans.
The submerged surface has mountainous features, including a globe-spanning mid-ocean ridge system, as well as undersea volcanoes, [7] oceanic trenches, submarine canyons, oceanic plateaus and abyssal plains. The mass of the oceans is approximately 1.35 × 10 18 metric tons, or about 1/4400 of the total mass
A bathymetric map of the Mid-Atlantic Ridge (shown in light blue in the middle of the Atlantic Ocean). The Mid-Atlantic Ridge is a mid-ocean ridge (a divergent or constructive plate boundary) located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world.
Klepáč – one of six places in Europe where three watersheds meet Rhine–Danube watershed marker near Weitnau, Germany European watershed marker (Lviv Oblast, 2009). The divide continues northwards along the Albula Alps to Julier Pass, Albula Pass and Flüela Pass south of Davos, between the catchment area of the Rhine, which empties into the North Sea via the Netherlands, and the Danube ...
Oceanic trenches — the deepest parts of the ocean floor, typically formed when one tectonic plate slides under another. Geology portal; Subcategories.