Earth's mantle & Plate tectonics - Unionpedia, the concept map

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Difference between Earth's mantle and Plate tectonics

Earth's mantle vs. Plate tectonics

Earth's mantle is a layer of silicate rock between the crust and the outer core. Plate tectonics is the scientific theory that Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago.

Asthenosphere

The asthenosphere is the mechanically weak and ductile region of the upper mantle of Earth.

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Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's five oceanic divisions, with an area of about.

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Basalt

Basalt is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon.

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Continental crust

Continental crust is the layer of igneous, metamorphic, and sedimentary rocks that forms the geological continents and the areas of shallow seabed close to their shores, known as continental shelves.

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Continental drift

Continental drift is the hypothesis, originating in the early 20th century, that Earth's continents move or drift relative to each other over geologic time.

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Convection

Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy).

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Convergent boundary

A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide.

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Crust (geology)

In geology, the crust is the outermost solid shell of a planet, dwarf planet, or natural satellite.

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Hotspot (geology)

In geology, hotspots (or hot spots) are volcanic locales thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle.

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Internal structure of Earth

The internal structure of Earth are the layers of the Earth, excluding its atmosphere and hydrosphere.

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Lithosphere

A lithosphere is the rigid, outermost rocky shell of a terrestrial planet or natural satellite.

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Magma

Magma is the molten or semi-molten natural material from which all igneous rocks are formed.

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Mantle (geology)

A mantle is a layer inside a planetary body bounded below by a core and above by a crust.

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Mantle plume

A mantle plume is a proposed mechanism of convection within the Earth's mantle, hypothesized to explain anomalous volcanism.

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Mid-ocean ridge

A mid-ocean ridge (MOR) is a seafloor mountain system formed by plate tectonics.

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Oceanic crust

Oceanic crust is the uppermost layer of the oceanic portion of the tectonic plates.

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Ophiolite

An ophiolite is a section of Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed, and often emplaced onto continental crustal rocks.

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Seabed

The seabed (also known as the seafloor, sea floor, ocean floor, and ocean bottom) is the bottom of the ocean.

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Seafloor spreading

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.

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Subduction

Subduction is a geological process in which the oceanic lithosphere and some continental lithosphere is recycled into the Earth's mantle at convergent boundaries.

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Upper mantle

The upper mantle of Earth is a very thick layer of rock inside the planet, which begins just beneath the crust (at about under the oceans and about under the continents) and ends at the top of the lower mantle at.

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