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| Calcium Carbonate: | chemical compound (CaCO3); found in rock; also known to gardeners as lime; for more info visit Wikipedia |
| Riparian Zone: | a strip of land around a stream (stream bank); for more info visit wikipedia |
| Shell Marl: | mud made rich in calcium carbonate (also known as lime) because of the ground up shells of ancient water-dwelling animals; for more info visit The Public Bookshelf |
| Watermeal: | a duckweed plant, thought to be the world's smallest flowering plant, found in the Potomac Marsh |
| word: | def |
| word: | def |
