illustrative depiction of a ground cross-section to explain vulcanism, earth layers and plate tectonics

biosphere boundary continental convection convergent crust earth layers earthquake earthquakes education eruption force geography geology geomorphology geophysics lava flow lithosphere magma mantle motion mountain mountains nature ocean oceanic trench planet plate tectonics process rift valley rock schematic science seismic area structure subduction tectonic topography transform fault volcano vulcanism wedge illustrative depiction ground cross-section explain generated