The mantle =)
If you were 100 km below the surface you would be in the upper mantle / asthenosphere.
The layer of the Earth that includes the surface is the crust. It is the outermost solid layer of the Earth, ranging from 5 to 70 km thick beneath the oceans and up to 100 km thick beneath the continents.
The asthenosphere begins approximately 100-200 kilometers below the Earth's surface and extends to about 700 kilometers deep. It is a semi-fluid layer of the upper mantle that allows tectonic plates to move and slide.
I will answer this with a comparison from the good old US Army: it's the same as the maximum effective range of the M2 Get Lost Kit -- zero meters. The lithosphere is the surface of the Earth.
The mesosphere is the layer of Earth's atmosphere above the stratosphere and below the thermosphere. It extends from 50 kilometers to 100 kilometers above sea level. The name mesphere also, though less often, refers to a layer of Earth's mantle between the asthenosphere and the outer core. It extends from 660 kilometers to 2,700 kilometers below the surface.
If you were 100 km below the surface you would be in the upper mantle / asthenosphere.
The layer of the Earth that is roughly 100 km below the surface is part of the upper mantle called the asthenosphere. This region is characterized by its partially molten rock that allows for the movement of tectonic plates.
The mantle =)
The layer of the Earth that includes the surface is the crust. It is the outermost solid layer of the Earth, ranging from 5 to 70 km thick beneath the oceans and up to 100 km thick beneath the continents.
The asthenosphere begins approximately 100-200 kilometers below the Earth's surface and extends to about 700 kilometers deep. It is a semi-fluid layer of the upper mantle that allows tectonic plates to move and slide.
I will answer this with a comparison from the good old US Army: it's the same as the maximum effective range of the M2 Get Lost Kit -- zero meters. The lithosphere is the surface of the Earth.
The depth below the Earth's surface of the lithosphere varies depending on location, but on average it extends to about 100 kilometers (62 miles) deep. This layer includes the crust and upper part of the mantle and is characterized by its rigidity and brittle behavior.
The mesosphere is the layer of Earth's atmosphere above the stratosphere and below the thermosphere. It extends from 50 kilometers to 100 kilometers above sea level. The name mesphere also, though less often, refers to a layer of Earth's mantle between the asthenosphere and the outer core. It extends from 660 kilometers to 2,700 kilometers below the surface.
It begins 100-150km below the Earth's surface and extends to approximately 300km below.
The Lithosphere is the ridged layer of Earth that is about 100 km think and generally less dense than the material below it. This layer is the tectonic plates the move along on the anthesphere.
The asthenosphere begins at around 100-150 km depth in the Earth. This is below the lithosphere, which consists of the crust and the uppermost mantle (the plates in plate tectonics).The asthenosphere is in the mantle, but it is still unclear how much of the mantle (which goes down to a depth of ~2900 km) is actually part of the asthenosphere.
The mesosphere is the layer of Earth's atmosphere above the stratosphere and below the thermosphere. It extends from 50 kilometers to 100 kilometers above sea level. The name mesphere also, though less often, refers to a layer of Earth's mantle between the asthenosphere and the outer core. It extends from 660 kilometers to 2,700 kilometers below the surface.