What Is An Oceanic Ridge

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What is the meaning of oceanic ridges?

oceanic ridge continuous submarine mountain chain extending approximately 80 000 km (50 000 miles) through all the world’s oceans. Individually ocean ridges are the largest features in ocean basins. … Oceanic ridges are not to be confused with aseismic ridges which have an entirely different origin.

What is an ocean ridge simple definition?

noun. any section of the narrow largely continuous range of submarine mountains that extends into all the major oceans and at which new oceanic lithosphere is created by the rise of magma from the earth’s interiorSee also sea-floor spreading.

What is an oceanic ridge example?

Mid-ocean ridges form where two tectonic plates are pulling apart also called seafloor spreading. … The Mid-Atlantic Ridge which is spreading one to two inches a year along with the East Pacific Rise which is spreading two to six inches a year are two examples of very long mid-ocean ridges.

How was the oceanic ridge created?

Tectonic plates can slide on top of the asthenosphere. … If the tectonic plates move away from each other magma from the asthenosphere can push up through the gap causing an underwater volcano. The magma cools and solidifies creating new layers of ocean crust that continues to build forming the oceanic ridges.

What is the function of the Mid Oceanic Ridge?

Mid-ocean ridges are the longest largest and most voluminous magmatic environment on Earth. Ridges are the site of new lithospheric and crustal production that may be subsequently subducted into the mantle and recycled or involved in magma-producing dehydration reactions that slowly build up continental crust (Fig.

Where is the Mid Oceanic Ridge?

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.

What is the meaning of ridge in science?

A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for some distance. The sides of the ridge slope away from narrow top on either side.

Which is characteristic of mid-oceanic ridges?

A mid-ocean ridge (or mid-oceanic ridge) is an underwater mountain range typically having a valley known as a rift running along its axis formed by plate tectonics. This type of oceanic ridge is characteristic of what is known as an oceanic spreading center.

What is a ridge in geography?

What is the difference between oceanic ridge and mid-ocean ridge?

Explanation: Mid ocean ridge are where new crustal material is forced to the surface. The new crustal material is pushed apart forming two different plates moving in two different directions. An ocean trench is where old crustal material is pushed under another plate where it is melted and turned into magma.

What is Mid Oceanic Ridge Upsc?

Mid-ocean ridge | UPSC – IAS. … These ridges are mountain-like structures standing well above the deep ocean floors. The mid oceanic ridges are in total 65 000 km long and cover almost 23% of the earth’s surface. These are considered as the world’s largest mountain ranges existing below marine waters.

Where are seamounts located?

mid-ocean ridges
Seamounts are commonly found near the boundaries of Earth’s tectonic plates and mid-plate near hotspots. At mid-ocean ridges plates are spreading apart and magma rises to fill the gaps.

How are ocean ridges?

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.

How are oceanic ridges involved in the movement of two continents?

Seafloor spreading gradually pushes tectonic plates apart at mid-ocean ridges. When this happens the opposite edge of these plates push against other tectonic plates. Subduction occurs when two tectonic plates meet and one moves underneath the other (Fig. 7.23).

How do oceanic ridges differ from most mountain ranges on the continents?

How do oceanic ridges differ from continental mountain ranges? Most mountain ranges form through the collisions of two continents whereas oceanic ridges form when material upwells from the mantle and generates new oceanic crust.

What is the role of mid-ocean ridge in seafloor spreading?

Mid-ocean ridges and seafloor spreading can also influence sea levels. As oceanic crust moves away from the shallow mid-ocean ridges it cools and sinks as it becomes more dense. This increases the volume of the ocean basin and decreases the sea level.

What is a mid-oceanic ridge where is it formed give an example of one?

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.

What are the five example of ocean ridges?

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.

Is the Mid Atlantic Ridge oceanic or continental?

Mid-Atlantic Ridge submarine ridge lying along the north-south axis of the Atlantic Ocean it occupies the central part of the basin between a series of flat abyssal plains that continue to the margins of the continental coasts.

See also where is active seafloor spreading occurring today

Are mid ocean ridges found in all oceans?

The mid-ocean ridges of the world are connected and form the Ocean Ridge a single global mid-oceanic ridge system that is part of every ocean making it the longest mountain range in the world.

What is a mid-ocean ridge for kids?

A mid-ocean ridge is an underwater mountain system. This consists of mountain chains with a rift valley running along its spine formed by plate tectonics. A mid-ocean ridge marks the boundary between two tectonic plates which are moving apart. A mid ocean ridge is made by a divergent boundary.

What ridge means?

A ridge is a line that rises above what it is attached to. … From the Old English hrycg meaning “back of the man or beast” or “the top or crest” of something (combined the senses mean “backbone”) ridge is often used for the beam that joins the parts of a sloping roof.

What exactly is a ridge?

1 : an elevated body part or structure. 2a : a range of hills or mountains. b : an elongate elevation on an ocean bottom. 3 : an elongate crest or a linear series of crests. 4 : a raised strip (as of plowed ground)

What is ridge in human body?

anatomy any elongated raised margin or border on a bone tooth tissue membrane etc. the top of a roof at the junction of two sloping sides.

What is the largest underwater mountain range?

The mid-ocean ridge
The mid-ocean ridge is the longest mountain range on Earth. The longest mountain range on Earth is called the mid-ocean ridge. Spanning 40 389 miles around the globe it’s truly a global landmark. About 90 percent of the mid-ocean ridge system is under the ocean.Feb 26 2021

What happens when two oceanic plates collide?

A subduction zone is also generated when two oceanic plates collide — the older plate is forced under the younger one — and it leads to the formation of chains of volcanic islands known as island arcs. … Earthquakes generated in a subduction zone can also give rise to tsunamis.

See also how can the sun burn without oxygen

How are oceanic ridges and deep ocean trenches related to plate tectonics?

How are mid ocean ridges and deep ocean trenches related to plate tectonics? … Mid-ocean ridges are spreading centers that is they are divergent plate boundaries where magma wells up from below creating new oceanic crust. Ocean trenches form where crustal plates plunge back into the mantle.

What is a ridge in geography give some example?

ridge in Geography topic

b) the part at the top of a roof where the two sides meet3 → ridge of high pressureExamples from the Corpusridge• Over to the right is rough dune land a big area before you top a ridge of shingle.

What is an example of a ridge?

The definition of a ridge is a long narrow crest of something. An example of a ridge is the strip of mountains in the Southeast area of Mt. Everest from Nepal. An example of a ridge is along an animal’s backbone.

What is the difference between a ridge and a valley?

Ridge (Also: Arete or Spur) – A continuous elevated terrain with sloping sides. … Valley (Also: Gully Draw Couloir) – Long depression in the terrain that has a narrow elevated side and a wide lower opening. A valley can be “V” or “U” shaped and often can be seen as a “negative” to a ridge.

What is the difference between ocean ridges and ocean trenches?

Trench: very deep elongated cavity bordering a continent or an island arc it forms when one tectonic plate slides beneath another. Ridge: underwater mountain range that criss-crosses the oceans and is formed by rising magma in a zone where two plates are moving apart.

What is the difference between an oceanic rift and an oceanic trench?

Explanation: Mid-ocean ridges are areas of rifting where two tectonic plates are diverging from one another. … Rifting creates new crust. Deep-ocean trenches are formed at convergent plate boundaries where the more dense plate (usually the oceanic) subducts under the less dense (usually continental).

What is occurring at oceanic trenches?

Trenches are formed by subduction a geophysical process in which two or more of Earth’s tectonic plates converge and the older denser plate is pushed beneath the lighter plate and deep into the mantle causing the seafloor and outermost crust (the lithosphere) to bend and form a steep V-shaped depression.

How is the ocean floor divided?

The ocean floors can be divided into four major divisions: (i) the Continental Shelf (ii) the Continental Slope (iii) the Deep Sea Plain (iv) the Oceanic Deeps. Besides these divisions there are also major and minor relief features in the ocean floors like ridges hills sea mounts guyots trenches canyons etc.