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| rich soil containing a relatively equal mixture of sand, silt and a smaller proportion of clay |
| slow movement of water through the pores in soil or permeable rock |
| subduction (səb-dŭk'shən) Pronunciation Key
A geologic process in which one edge of one lithospheric plate is forced below the edge of another. The denser of the two plates sinks beneath the other. As it descends, the plate often generates seismic and volcanic activity (from melting and upward migration of magma) in the overriding plate. Compare obduction. subduct verb |