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The upper mantle of Earth is a very thick layer of rock inside the planet, which begins just beneath the crust (at about 10 km (6.2 mi) under the oceans and about 35 km (22 mi) under the continents) and ends at the top of the lower mantle at 670 km (420 mi).
30 Απρ 2024 · Upper Mantle. The upper mantle extends from the crust to a depth of about 410 kilometers (255 miles). The upper mantle is mostly solid, but its more malleable regions contribute to tectonic activity. Two parts of the upper mantle are often recognized as distinct regions in Earth’s interior: the lithosphere and the asthenosphere. Lithosphere
The upper mantle refers to the region below the Earth's crust extending to a depth of about 410 km. It is primarily composed of peridotite rocks containing minerals like olivine and pyroxene, with additional minerals such as oxides and hydrates that can influence its physical properties.
1 Αυγ 2023 · There are two sections of the mantle: the upper mantle, which is more rigid and behaves elastically on short time scales, and the lower mantle, which is solid but flows on geological timescales. The Outer Core. The outer core extends from 2,900 km to about 5,150 km beneath the Earth’s surface. It mainly consists of liquid iron and nickel.
1 Ιαν 2021 · The upper mantle is defined as that part of the mantle between the crust and the phase transition of γ–olivine to perovskite. The total mass of the upper mantle is 1.06 × 10 24 kg, about a quarter of the total mass of the mantle.
Earth's upper mantle is divided into two major rheological layers: the rigid lithosphere comprising the uppermost mantle (the lithospheric mantle), and the more ductile asthenosphere, separated by the lithosphere-asthenosphere boundary.
The upper mantle is the layer of the Earth's interior located directly beneath the crust and above the lower mantle, extending to a depth of about 410 kilometers.
