The mid-ocean ridge is the most extensive chain of mountains on Earth, stretching nearly 65,000 kilometers (40,390 miles) and with more than 90 percent of the mountain range lying in the deep ocean. … The ridge system forms the longest and largest mountain range on Earth, winding its way between the continents.
What is a mid-ocean ridge simple definition?
The mid-ocean ridge is the most extensive chain of mountains on Earth, stretching nearly 65,000 kilometers (40,390 miles) and with more than 90 percent of the mountain range lying in the deep ocean. … The ridge system forms the longest and largest mountain range on Earth, winding its way between the continents.
What is the meaning of ocean ridge?
oceanic ridge, any of several continuous submarine mountain chains rising from the ocean floor. Individually, oceanic 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 the meaning of Mid ocean?
Midocean meaning
The area in the middle of an ocean, far from shore. noun.
What is an example of a mid-ocean ridge?
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.
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 is a mid-ocean ridge quizlet?
mid-ocean ridge. an undersea mountain chain where new ocean floor is produced at a divergent plate boundary.
Where is the mid-ocean ridge?
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.
What is mid-oceanic ridge Upsc?
A mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. It is composed of two chains of mountains divided by a large depression.
https://youtube.com/watch?v=xbJT_DgAyH0
Which is the best description of a mid-ocean ridge?
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.
Why are mid-ocean ridges 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 oceans have mid-ocean ridges?
Two of the most carefully studied mid-ocean ridges are the Mid-Atlantic Ridge and the East Pacific Rise (called a rise because it has more gentle slopes). The Mid-Atlantic Ridge runs down the center of the Atlantic Ocean.
What are the 3 types of mid-ocean ridges?
- Axial Ridge.
- Magnetics & Polarity.
- Fast/Slow Spreading.
What is fractionated plateau?
The fractioned plateau is the longest mountain chain on the earth’s surface which is submerged under the sea. It is characterized by a central rift system at the crest.
What is a mid-ocean ridge 6th grade definition?
Definition of mid-ocean ridge
: an elevated region with a central valley on an ocean floor at the boundary between two diverging tectonic plates where new crust forms from upwelling magma.
How does a mid-ocean ridge form?
The mid-ocean ridge is a continuous range of undersea volcanic mountains that encircles the globe almost entirely underwater. It formed and evolves as a result of spreading in Earth’s lithosphere—the crust and upper mantle—at the divergent boundaries between tectonic plates. …
What is the border between two plates called?
The border between two tectonic plates is called a boundary. All the tectonic plates are constantly moving — very slowly — around the planet, but in many different directions.
What is a mid-oceanic ridge where is it formed give an example of one quizlet?
The Mid-Atlantic Ridge is when the seafloor spreads and forms a mountain underwater. An example is the extension from south of Iceland to the extreme South Atlantic Ocean near 60° S latitude. It bisects the Atlantic Ocean basin, which led to the earlier designation of mid-ocean ridge for features of this type.
Where do mid-ocean ridges form quizlet?
How do mid-ocean ridges form? Underneath the ocean, deep in the earth convection currents bring molten material up to the upper mantle. This material rises through faults (cracks) between oceanic plates that are moving away from one another. This material fills the cracks, hardens, and forms new crust.
Who found the mid-ocean ridge?
It is now called the Mid-Ocean Ridge. In 1953, American physicists Maurice Ewing (1906-1974) and Bruce Heezen (1924-1977) discovered that through this underwater mountain range ran a deep canyon.
What is paleomagnetism geography?
Paleomagnetism, or palaeomagnetism, is the study of the record of the Earth’s magnetic field in rocks, sediment, or archeological materials. … This record provides information on the past behavior of Earth’s magnetic field and the past location of tectonic plates.
Where is the largest mid-ocean ridge?
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 paleomagnetism Upsc?
Paleomagnetism is the study of the record of the earth’s magnetic field with the help of magnetic fields recorded in rocks, sediment, or archaeological materials. The polarity of the Earth’s magnetic field and magnetic field reversals are thus detectable by studying the rocks of different ages.
What is the oceanic crust?
oceanic crust, the outermost layer of Earth’s lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges, which occur at divergent plate boundaries. … Oceanic crust differs from continental crust in several ways: it is thinner, denser, younger, and of different chemical composition.
How mid-oceanic ridge is formed Upsc?
Mid oceanic ridge formation
It occurs along the divergent plant boundaries when a new floor is formed, due to earth tectonic plates spread apart, also called seafloor spreading. In the volcanic eruption, molten basalt comes out. The speed of spreading of molten basalt affects the shape of the ridge.
How are 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 is formed when the ocean floor moves on either side of a mid-ocean ridge?
Seafloor spreading or Seafloor spread is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
What type of plate boundary is occurring in the Mid-Atlantic Ridge?
Perhaps the best known of the divergent boundaries is the Mid-Atlantic Ridge. This submerged mountain range, which extends from the Arctic Ocean to beyond the southern tip of Africa, is but one segment of the global mid-ocean ridge system that encircles the Earth.
Do mid-ocean ridges move?
The continual process of seafloor spreading separated the stripes in an orderly pattern. Oceanic crust slowly moves away from mid-ocean ridges and sites of seafloor spreading.
What is submarine mountain?
Undersea mountain ranges are mountain ranges that are mostly or entirely underwater, and specifically under the surface of an ocean. If originated from current tectonic forces, they are often referred to as a mid-ocean ridge. In contrast, if formed by past above-water volcanism, they are known as a seamount chain.
How many types of ridges are there?
In particular, four classes of oceanic ridges are considered: spreading-center ridges, fracture-zone ridges, basaltic-volcanic ridges, and island arc ridges. The formation and tectonic histories of all oceanic ridges under these four classes can be developed using the concept of plate tectonics.
What are some examples of ridges?
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. A narrow, raised strip, as in cloth or on plowed ground.
What are submarine ridges?
Submarine ridges are elongated steep-sided elevations of the seafloor.
What is the difference between a rift valley and a trench?
is that trench is a long, narrow ditch or hole dug in the ground while rift is a chasm or fissure.
What is a linear sea?
Successive volcanism and seafloor spreading create spreading sites where new crust is formed (divergent boundary is also called a constructive edge). Oceanic crust starts to replace continental crust. This stage is the formation of linear seas.
https://youtube.com/watch?v=B89IvZMAxjQ