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| capability of a porous rock or sediment to permit the flow of fluids through its pore spaces |
| to dissolve out soluble constituents from ashes and soil by percolation |
pluton (pl 'tŏn') Pronunciation Key
A large body of igneous rock formed when a plume of magma cools and solidifies underground. Although most plutons are deep within the Earth's crust, some become exposed at the surface due to plate-tectonic processes. |