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| seepage of water into soil or rock |
| process where the surface of the earth is worn away by the action of water, glaciers, winds, waves |
| cap rock | |
| —n | |
| 1. | a layer of rock that overlies a salt dome and consists of limestone, gypsum, etc |
| 2. | a layer of relatively impervious rock overlying an oil- or gas-bearing rock |