Continental rift zones, where a continent is being torn apart, feature magma located at intermediate depths of 20 to 80 kilometers. Magma resides in a specific region within the Earth known as the mantle, primarily within the upper mantle just below the rigid outer shell called the lithosphere.
Subduction Zone Magma: The Hidden Reservoir at 100-150 km Depth
Directly below the lithosphere is the asthenosphere, a zone of the upper mantle that is weaker and ductile. Within the upper part of the mantle, conditions are just right for rock to melt, creating the pockets and zones of magma.
The Lithosphere and Asthenosphere The rigid, outermost layer of the Earth, including the crust and the uppermost part of the mantle, is called the lithosphere. The Role of Heat and Pressure.
Subduction Zone Magma Depths at 100 to 150 km
This layer is broken into tectonic plates that float and move on the layer beneath it. Below the crust lies the mantle, a thick layer of solid rock that behaves in a plastic, flowing manner over long geological timescales.
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