Plate tectonics are plate movements which will in turn cause earthquakes, volcanic eruptions, mountain ranges, and islands.
Plate tectonics are plate movements which will in turn cause earthquakes, volcanic eruptions, mountain ranges, and islands.
"Pangaea" means "all the earth", and is the name given to a mega-continent which formed in the distant past when all of the Earth's continents had merged together.
The Indian subcontinent is moving north into the southern part of the Asian continent. At the junction this enormous collision causes the raising of both the Himalayas mountains and north of that the Tibetan plateau.
No, the relative sizes of the oceans change.
The asthenosphere lies below the lithosphere and the oceanic crust. If oceanic-continental convergence was to cease (unlikely as to the enormous momentum involved) subduction would presumable lessen and, as the momentum of one plate against another stopped moving, an equilibrium state would presumably exist.
The rate of tectonic activity is strongly correlated with sea-floor being created and destroyed. It is plate tectonics that are responsible for the change of landmass and sea size and shape by changing the depth and position of protrusions and intrusions in the Earth's crust. However, these elements do not correlate with "oceans melting", since "oceans melting" is nonsensical. Oceans are already liquid and. therefore, do not melt.
Continental plate (made of light, old acid rocks and quite thick) Oceanic plate (made of basaltic rocks, young and quite thin).
There was the single large continent long ago. Now that there are many and they are drifting away from each other. Here goes the probable explanation for the same. The continents was above the sea level. Here goes the simple experiment to explain the same. You put the say about ten logs of wood. Place nine logs on them. Then put eight logs above them. Then put seven logs above them. Then six. I do… Read More
Scientists used detectors which determined the mantle existed. As well, scientists must hypothesize and theorize what cannot be readily seen, and make determinations based on the evidence that does exist.
It doesn't have a role. It is a natural phenomena
The pole reversals leave a magnetic signature in cooling volcanic rocks. These reversal signatures are found across the oceanic sea floors in a mirrored pattern either side of the mid oceanic ridges, providing evidence of sea floor spreading (part of the plate tectonic process).
Most earthquakes occur along the oceanic and continental plates where two plates are running into each other or sliding past each other. Fault lines or cracks in the earth can be created along these plate edges. The Pacific plate is the most active so most of the earthquakes are along the edge of that plate such as the Ring of Fire in the basin of the Pacific Ocean.
Not San Francisco proper, but parts of the metropolitan area do. The city of San Francisco itself lies entirely on the North American plate, with the San Andrea Fault passing just south and west of the city. Parts of nearby Daly City and Pacific lie on the Pacific Plate.
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A boundary where the plates are moving apart is called a divergent boundary. It is also called a constructive boundary because new crust is made there.
Yes they do, at about the same speed that your finger nails grow.
The Richter Scale is used to rate earthquakes.
Continental volcanic arcs are the result of a subduction plate boundary. An example of this type of plate boundary can be seen in the Cascade Volcanic Arc which extends from Canada south to Northern California. The volcanoes in this arc are the result of the Juan De Fuca plate (and a couple of other smaller fracture plates) being subducted under the North American plate resulting in the formation of the volcanic arc along the western… Read More
They'd stop moving.
subduction of an oceanic plate under a continental plate.
The theories of continental drift and plate tectonics. These are relatively new ideas; when I was young, they were still fairly controversial. But as the evidence has accumulated, most people have become convinced that these are valid explanations of how things came to be as they are. Just remember that the next time somebody says that something is "settled science"; the science of any discipline is NEVER settled.
No layer is truly made of liquid rock. The mantle is sometimes, inaccurately, said to be liquid rock when it is in fact solid, albeit relatively soft. The outer core is liquid, but it consists of liquid metal, not rock.
The continents and the ocean floor rest upon the plates.
Convection currents occur in the Earth's mantle
The Ring of Fire is a string of volcanoes and sites ofseismic activity, or earthquakes, around the edges of the Pacific Ocean. Roughly 90% of all earthquakes occur along the Ring of Fire, and the ring is dotted with 75% of all active volcanoes on Earth. The Ring of Fire isn't quite a circular ring. It is shaped more like a 40,000-kilometer (25,000-mile) horseshoe. A string of 452 volcanoes stretches from the southern tip of… Read More
Not within the surface rocks, but at surface level yes. Air and water both convect.
Such a fold is called a syncline.
Understanding that the core of the Earth is still hot and semi-molten.
The most abundant element in the Earth overall is iron, at 32.1%, as it makes up most of the core.
An earthquake is the result of pressure becoming too great a strain on the bedrock underground or near the surface. It is this shock that sends out waves (from the epicentre) that can cause damage to property and may result in loss of live. If the earthquake happens out at sea, a tsunami could make landfall and cause devastation to coastal regions.
The crust is still being formed at places that are geologically active. The 'Ring of Fire', The Mid Atlantic Ridge etc
You would need to find a continental rift. The best example of an active continental rift is the East African Rift.
Oceanic subducts because it is more dense; Volcanoes form on Continental Crust.
The crust that forms the tectonic plates floats on the mantle layer.
A destructive plate boundary is associated with the formation of the Himalayas.
The Ring of Fire has nearly 500 volcanoes.
This is the deep mantle hotspot that is located approximately under Yellowstone National Park and is responsible for producing all the geothermal phenomena in and around the park. There are a few dozen deep mantle hotspots scattered around the world, including Iceland, Hawaii, Samoa, Easter Island, East Australia, Bermuda, Marion, Reunion, Cape Verde, Canary Islands, Afar, Mount Etna, Azores.
Earthquakes occur along faults, where two blocks for rock move against one another. The blocks snag on one another, build up stress, and then release it as an earthquake. Most active faults are found at or near plate boundaries, where two large segments of the crust move past each other. The relatively large amount of movement and stress compared to intraplate settings means there are more and larger faults, which leads to more frequent and… Read More
Geologists use seismic waves to locate an earthquake's epicenter.
Volcanoes form across the boundaries of Earth's plates.
The spreading is too slow for the oceans to even notice it in the short term. In the very long term, the ocean over the spreading gets larger (unless there is subduction on its borders, in which case it may even shrink).
its called a fault
Oceanic crust is thin and composed mostly of dense basaltic rock. Continental crust is thick and composed mostly of light granitic rock.
It is mantle, crust and lithosphere
Mount Shasta is inside the western end of the North American continental plate, west of it under the Pacific ocean the Pacific oceanic plate is subducting under the North American continental plate. Deep under the North American continental plate friction with the descending Pacific oceanic plate, melts rock in the contact zone which feeds the magma supply of Mount Shasta. As the magma surfaces trapped ocean water flashes to steam producing explosive lava.
gravity acting on the edges of plates and convection in the mantle
Most seafloor is made of a thin dense basaltic igneous rock with a layer of sedimentary rock on that topped by unconsolidated marine sediments.
Earthquakes occur when the crust slips. The other events and processes are unrelated.
The UK sits towards the Western edge of the Eurasian plate.
Volcanoes away from plate boundaries are associated with hot spots. Hot spots mark places where extra hot material rises from deep within the mantle, possibly from near the core.
they will form a mountain
Tectonic plate interactions are of three different basic types: Divergent boundaries are areas where plates move away from each other, forming either mid-oceanic ridges or rift valleys. These are also known as constructive boundaries. Convergent boundaries are areas where plates move toward each other and collide.
For one thing many of its premises are far from uncontroversial. A minority of geologists internationally dissent from the Plate Tectonics paradigm to one degree or another. Many of the latter are loosely organized around the New Concepts in Global Tectonics Group. These geologists and geophysicists have also organized special sessions at meetings of the International Geological Congress and the European Geophysical Union, and continue to publish the New Concepts in Global Tectonics newsletter.
Earthquakes happen everywhere, but they're more frequent in some areas then others. It's quicker to explain where Earthquakes happen and let you work out where they're less likely to happen. Earthquakes are most common at tectonic plate boundaries, that is, where different plates meet. The largest events usually happen where two plates are colliding. About 90% of the world's earthquakes happen along the ring of fire. The ring of fire is roughly where the Pacific… Read More
It is the state of an elastic object which is stretched in a way which increases its length.
a text book
Hot spot volcanoes are not associated with plate interactions.
On continents it is called a Rift Valley or Graben. in the ocean it is call a Mid Oceanic Ridge.
Escape of thermal energy form the Earth's core.
divergent - creates new crustal rock convergent - destroys old crustal rock
Earth's interior is heated mostly by radioactive decay in the core and mantle. Additional heat is leftover from Earth's formation and generated by the crystallization of the solid inner core.
It plays a number of roles. First, the tectonic plates essentially float on the asthenosphere because they are less dense. Second, since oceanic crust is denser than continental crust, it can subduct into the mantle while continental crust cannot. Plate tectonics is driven in part by mantle convection, which results from variations in density due to temperature differences.
New floor forms and spreads from mid-ocean ridges
A section of both continental and oceanic lithosphere
Does not transfer rocks to or from the mantle
In geology, the crust is the outermost solid shell of a rocky planet or natural satellite, which is chemically distinct from the underlying mantle. The crusts of Earth, the Moon, Mercury, Venus, Mars, Io, and other planetary bodies have been generated largely by igneous processes, and these crusts are richer in incompatible elements than their respective mantles. Earth's crust The internal structure of Earth The crust of the Earth is composed of a great variety… Read More
Convection currents in the mantle
Slab-pull and ridge-push acting together
A continuous flow in the mantle caused by differences in density
Convergent and divergent boundaries
Not necessarily. Rock layers along a strike-slip fault may be offset if they are dipping.
It depends how they collide. You either get a mid-ocean subduction zone - where one plate 'slides' over the other - forcing one plate down under the Earth's surface... or - you get a mid-ocean ridge - where both plates simply push against each other - creating an underwater mountainous chain.
They proved that the seafloor was spreading.
The The crust and the uppermost layer of the mantle form the lithosphere. The asthenosphere, which is still in the upper mantle, is the next layer down.
Volcanoes don't help plate tectonics; volcanoes are the result of plate tectonics.
it's so thick because there is more rock and dart.
Continental crust beneath a tall, young mountain
Where old oceanic crust meets continental crust or younger oceanic crust at a convergent plate boundary it gets forced down into the mantle. This process does not necessarily happen when the crust is 180 millions years old. Rather, the oldest oceanic crust is found along the edges of the Atlantic ocean, dating to when it first formed in the Jurassic period.
The Earth's surface rides on a number of large "plates" in the Earth's crust. Like a hard-boiled egg that's been dropped, the shell has cracks. As the plates shift or move around, they cause earthquakes and volcanoes around the edges. The Philippine Islands are on boundary between two such plates.
Ocean crust keeps being recycled (by being subducted under continental plates. (Note, some of the Pacific plate is older than 150 million years old.)
what does plate tectonics theory predict about the distribution of earthquakes an volcanoes
Convection and Gravity
the plates moving the earth --------------------------------------------------------- The above answer is INCORRECT the plates move the continents around but do not make them GROW. Continents only grow very (VERY) slowly as the processes of volcanology and erosion slowly bring lighter minerals from the mantle to the surface and leave them there. The continents separated out very early in Earths history when it was still all molten and they represent the thin "scum" of light minerals that… Read More
Mantle convection currents move the crustal plates that float atop the mantle. Like convection currents in a hot cup of coffee or tea move pepper flakes or pieces of glitter sprinkled on top and floating on the liquid.
The lower mantle, near the core, is hotter than the upper mantle near the crust. The cooler mantle material will there fore tend to sink while the hooter material will tend to rise. The mantle is hot enough that the rock in it is soft, though it is under too much pressure to actually melt, and can therefore flow over the course of millions of years.
The Mantle. It is the largest and thickest layer in the earth. But this answer might not be actually true. Because the earth has all these layers and the mass is added up. -By Olivia Agbo A 12 year old. Thank you for your support.
Made ocean ridges & mountains