Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth’s tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.
Which of the following is a feature associated with mid-ocean ridges?
Mid-ocean ridges are present in all ocean basins. They are the shallowest and youngest parts of deep ocean basins. Features associated with ocean ridges include volcanism (undersea volcanic features), undersea rift valleys, and hydrothermal vents.
What are oceanic ridges made of?
The material that erupts at spreading centers along the mid-ocean ridge is primarily basalt, the most common rock on Earth. Because this spreading occurs on a sphere, the rate separation along the mid-ocean ridge varies around the globe.
What are the 7 major oceanic ridge systems?
This ridge system includes the Mid-Atlantic Ridge, Mid-Indian Ocean Ridge, Carlsberg Ridge, Pacific-Antarctic Ridge, and the East Pacific Rise with its related features, including the Chile Rise, Galapagos Rift Zone, Gorda Rise, and Juan de Fuca Ridge.
Where are ocean ridges found?
Oceanic ridges are found in every ocean basin and appear to girdle Earth. The ridges rise from depths near 5 km (3 miles) to an essentially uniform depth of about 2.6 km (1.6 miles) and are roughly symmetrical in cross section. They can be thousands of kilometres wide.
What are the types of ridges?
Friction ridge patterns are grouped into three distinct types—loops, whorls, and arches—each with unique variations, depending on the shape and relationship of the ridges: Loops – prints that recurve back on themselves to form a loop shape.
Why is the oceanic ridge elevated?
At the ridge, new crust forms by igneous intrusion and extrusion. Since hot rocks are in a more expanded state and then contract as they cool (as they spread away from the ridge), the midocean ridges stand up high above the surrounding seafloor. The seafloor depth increases with distance away from the midocean ridges.
What are some examples of mid-ocean ridges?
List of mid-ocean ridges
Kolbeinsey Ridge – Segment of the Mid-Atlantic Ridge north of Iceland in the Arctic Ocean.Mohns Ridge.Knipovich Ridge (between Greenland and Spitsbergen)Reykjanes Ridge (south of Iceland)
What is not associated with mid-ocean ridge?
(a)Mid-ocean ridge is not associated with a convergent plate boundary. Explanation: Mid-ocean ridges form near divergent plate boundaries, where the new ocean bottom is formed when tectonic plates separate. The Molten rock rises to the seafloor as the plates separate, resulting in massive basalt volcanic eruptions.
How are ocean trenches formed?
In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.
What are submarine ridges?
Submarine ridges are elongated steep-sided elevations of the seafloor.
What are ridges explain any three types of ridges in detail?
The ridge like seafloor highs with various geological origins can be classed into mid-ocean ridges, transverse ridges related to transform faults, hot spot/mantle plume originated ridges, microcontinent rifted from major continent, intra-plate arc formed by interaction of two oceanic plates, and tectonic ridges
What are ridges and rises?
Ridges And Rises
So, what’s the difference between a ridge and a rise? It has to do with how fast they are spreading apart. Ridges are spreading apart more slowly, and thus have steep slopes and higher elevations; Rises are spreading quickly, so have gentle slopes and are lower in elevation.
How are oceanic ridges made?
A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.
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