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Earth's mantle is a rocky shell about 2,890 km (1,800 mi) thick that constitutes about 84 percent of Earth's volume. Two main zones are distinguished in the upper mantle: the inner asthenosphere composed of flowing rock in the state of plasticity, about 200 km thick, and the lowermost part of the lithosphere, composed of rigid rock, about 50 to 120 km thick. A thin crust, the upper part of the lithosphere, surrounds the mantle and is about 5 to 75 km thick. The mantle is divided into sections which are based upon results from seismology. These layers (and their depths) are the following: the upper mantle (starting at the Moho, or base of the crust around 7 to 35 km, downward to 410 km), the transition zone (410-660 km), the lower mantle (660-2891 km), and in the bottom of the latter region there is the anomalous D" layer with a variable thickness (on average ~200 km thick)
The deep mantle is the region in Earth's interior located between the lower mantle and the core. It extends from about 660 km to 2,900 km below the Earth's surface. This region is thought to consist mainly of solid rock undergoing high pressures and temperatures.
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Are mines deep enough to reach the mantle?
No, mines are not deep enough to reach the Earth's mantle. The Earth's mantle is located about 25 miles beneath the Earth's surface, while most mines only reach depths of a few miles.
What are plumes of molten rock originating deep within the mantle known as?
Plumes of molten rock originating deep within the mantle are known as mantle plumes. These plumes are believed to be responsible for hotspots and volcanic activity at the Earth's surface.
Is the deep mantle mostly solid?
Of course.
The deep mantle is composed of material with a lighter density than the outer mantle?
The deep mantle is actually composed of denser materials compared to the outer mantle. These denser materials are mainly made up of silicate minerals rich in iron and magnesium, which contribute to the overall density of the deep mantle. This density variation plays a key role in the movement of material within the Earth's mantle through processes like convection.
Topographic highs in the crust have deep what that extend into the mantle and provide buoyant support?
Topographic highs in the crust have deep roots that extend into the mantle and provide buoyant support through isostasy. These roots are a result of the difference in density between the crust and underlying mantle, allowing for uplifted regions to be supported by the denser mantle material beneath.
Are mines deep enough to reach the mantle?
No, mines are not deep enough to reach the Earth's mantle. The Earth's mantle is located about 25 miles beneath the Earth's surface, while most mines only reach depths of a few miles.
Is solid rock located deep in the mantle called magma?
No, solid rock located deep in the mantle is not called magma. Magma is molten rock that is found beneath the Earth's surface in the mantle and crust. Solid rock in the mantle is known as the lithosphere.
What are plumes of molten rock originating deep within the mantle known as?
Plumes of molten rock originating deep within the mantle are known as mantle plumes. These plumes are believed to be responsible for hotspots and volcanic activity at the Earth's surface.
Is the deep mantle mostly solid?
Of course.
how many km deep is the earths mantle?
2900 km
At deep ocean trenches what allows oceanic crust to sink back into the mantle?
Conduction. Heat istransferred from the mantle to the crust, melting it to become part of the mantle.
The deep mantle is composed of material with a lighter density than the outer mantle?
The deep mantle is actually composed of denser materials compared to the outer mantle. These denser materials are mainly made up of silicate minerals rich in iron and magnesium, which contribute to the overall density of the deep mantle. This density variation plays a key role in the movement of material within the Earth's mantle through processes like convection.
What is a energy source for hydrothermal vent?
The heat from deep in the earth's mantle.
Oceanic crust returns to the mantle at deep ocean trenches which are?
rocks
Topographic highs in the crust have deep what that extend into the mantle and provide buoyant support?
Topographic highs in the crust have deep roots that extend into the mantle and provide buoyant support through isostasy. These roots are a result of the difference in density between the crust and underlying mantle, allowing for uplifted regions to be supported by the denser mantle material beneath.
What is is the thickness of the upper mantle?
In oceanic areas the upper mantle is usually 5-200km thick and on continental areas it is 75-300km deep.
Plumes of the molten rock originating deep within the mantle are known as?
Mantle plumes. These are hot upwellings of magma from the Earth's mantle that can cause volcanic activity on the surface, such as hotspot volcanoes like those in Hawaii.
