molden
the answer is the Mesosphere
The layer you are referring to is the asthenosphere, which is composed of solid rock that flows slowly due to high heat and pressure. This layer is located beneath the lithosphere and is responsible for the movement of tectonic plates.
The oceanic crust is primarily made of solid rock, primarily basalt. However, beneath the oceanic crust, there is a layer of partially molten rock called the mantle that flows slowly over time.
The Earth's mantle is a solid layer beneath the crust that moves and flows slowly over the long term, causing tectonic plate movements. This slow movement is due to the high temperatures and pressures within the mantle, which allow the solid rock to deform and flow over time.
asthenosphere
a valley is made.
asthenosphere
That would be a glacier!
they slowly build up over time, then harden.
In the mantle, rocks are in a semi-solid state known as magma. The mantle is made up of solid rock that can deform and flow slowly over long periods of time due to the extreme heat and pressure found in this layer of the Earth.
the crust is made up of solid rock and mantle is made up of molten rocks
The thickest layer of the Earth is the mantle, which extends from the crust to the outer core. The mantle is approximately 2,900 kilometers (1,800 miles) thick and is made up of solid rock that flows slowly over long periods of time.