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A reef is a ridge or shoal of rock, coral, or similar relatively stable material lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic (non-living) processes such as deposition of sand or wave erosion planing down rock outcrops.
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reefs coral corals organisms built artificial algae provide biotic structures framework however may rock mounds structure skeletons surface processes types
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Reef | is a | ridge or shoal of rock | 0.90 | text |
| Reef | is a | reef that is attached to a landmass | 0.90 | text |
| Reef | is a | human-created underwater structure | 0.90 | text |
| deposition of sand or wave erosion planing down rock outcrops | instance of | processes | 0.80 | text |
| the coral reefs of tropical waters are formed by biotic | instance of | reefs | 0.80 | text |
| barnacles | instance of | artificial reefs generally provide stable hard surfaces where algae and invertebrates | 0.80 | text |
| corals | instance of | artificial reefs generally provide stable hard surfaces where algae and invertebrates | 0.80 | text |
| and oysters attach | instance of | artificial reefs generally provide stable hard surfaces where algae and invertebrates | 0.80 | text |
| Reef | related to Artificial | An | 0.60 | section |
| Reef | related to Artificial | Many | 0.60 | section |
| Reef | related to Artificial | Rigs-to-Reefs | 0.60 | section |
| Reef | related to Artificial | Other | 0.60 | section |
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