When rainwater soaks through the ground, it moves downward to collect above impermeable surfaces of clay or rock . This layer of water is called ground water.
A depression can dip into this water to form a wetland.
When rainwater soaks through the ground, it moves downward to collect above impermeable surfaces of clay or rock . This layer of water is called ground water. A depression can dip into this water to form a wetland.
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