We do not know, as nobody has ever been able to touch it.
The upper mantle
Yes, the Earth's mantle is typically divided into two layers: the upper mantle and the lower mantle. The upper mantle is closer to the Earth's crust and is more rigid, while the lower mantle is deeper and exhibits more plastic-like behavior.
A portion of the upper mantle known as the asthenosphere.
The plastic zone below the upper mantle is called the asthenosphere. It is a semi-fluid layer of the upper mantle where rock can flow like a viscous fluid over long periods of time. The asthenosphere plays a crucial role in the movement of tectonic plates.
The upper mantle, located beneath the Earth's crust, is characterized by its solid but plastic-like behavior, allowing it to flow slowly over geological timescales. It is primarily composed of silicate minerals rich in magnesium and iron, such as olivine and pyroxene. The upper mantle also plays a crucial role in tectonic processes, including the movement of tectonic plates and the generation of magma. Additionally, the upper mantle exhibits varying temperatures and pressures, contributing to phenomena like mantle convection and the formation of hotspots.
the upper-mantle rocks are heavier while the lower mantle rocks are semisolid like melted plastic
the upper-mantle rocks are heavier while the lower mantle rocks are semisolid like melted plastic
upper mantle
The two main parts of the mantle are the upper mantle and the lower mantle. The upper mantle is closer to the Earth's crust and is more rigid, while the lower mantle is closer to the core and is more fluid-like.
The lower part of the mantle is called the "lower mantle" or "mesosphere", while the upper part of the mantle is referred to as the "upper mantle" or "asthenosphere".
The crust and upper mantle make up the earth.
The upper mantle and the lower mantle.
The upper mantle is harder than the lower mantle
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.
The lower mantle is more rigid and dense than the asthenosphere in the upper mantle because of higher pressure and temperature conditions. The increased pressure in the lower mantle prevents rocks from flowing as easily as in the asthenosphere. This leads to higher density and rigidity in the lower mantle region.
The mantle is divided into the upper mantle and the lower mantle. The upper mantle lies directly beneath the Earth's crust and extends to a depth of about 410 miles. The lower mantle extends from the bottom of the upper mantle to a depth of about 1,800 miles.
The upper mantle is made of something called peridodite.