word | | Terrain |
| coral | American Samoa | five volcanic islands with rugged peaks and limited coastal plains, two coral atolls (Rose Island, Swains Island) |
| coral | Anguilla | flat and low-lying island of coral and limestone |
| coral | Antigua and Barbuda | mostly low-lying limestone and coral islands, with some higher volcanic areas |
| coral | Ashmore and Cartier Islands | low with sand and coral |
| coral | Bahamas, The | long, flat coral formations with some low rounded hills |
| coral | British Virgin Islands | coral islands relatively flat; volcanic islands steep, hilly |
| coral | Cayman Islands | low-lying limestone base surrounded by coral reefs |
| coral | Clipperton Island | coral atoll |
| coral | Cocos (Keeling) Islands | flat, low-lying coral atolls |
| coral | Cook Islands | low coral atolls in north; volcanic, hilly islands in south |
| coral | Coral Sea Islands | sand and coral reefs and islands (or cays) |
| coral | Guam | volcanic origin, surrounded by coral reefs; relatively flat coralline limestone plateau (source of most fresh water), with steep coastal cliffs and narrow coastal plains in north, low hills in center, mountains in ... |
| coral | Kiribati | mostly low-lying coral atolls surrounded by extensive reefs |
| coral | Marshall Islands | low coral limestone and sand islands |
| coral | Micronesia, Federated States of | islands vary geologically from high mountainous islands to low, coral atolls; volcanic outcroppings on Pohnpei, Kosrae, and Chuuk |
| coral | Nauru | sandy beach rises to fertile ring around raised coral reefs with phosphate plateau in center |
| coral | Navassa Island | raised coral and limestone plateau, flat to undulating; ringed by vertical white cliffs (9 to 15 m high) |
| coral | Northern Mariana Islands | southern islands are limestone with level terraces and fringing coral reefs; northern islands are volcanic |
| coral | Palau | varying geologically from the high, mountainous main island of Babelthuap to low, coral islands usually fringed by large barrier reefs |
| coral | Seychelles | Mahe Group is granitic, narrow coastal strip, rocky, hilly; others are coral, flat, elevated reefs |
| coral | Solomon Islands | mostly rugged mountains with some low coral atolls |
| coral | Tokelau | low-lying coral atolls enclosing large lagoons |
| coral | Tonga | most islands have limestone base formed from uplifted coral formation; others have limestone overlying volcanic base |
| coral | Tuvalu | very low-lying and narrow coral atolls |
| coral | United States Pacific Island Wildlife Refuges | low and nearly level sandy coral islands with narrow fringing reefs that have developed at the top of submerged volcanic mountains, which in most cases rise steeply from the ocean floor |
| coral | Wake Island | atoll of three low coral islands, Peale, Wake, and Wilkes, built up on an underwater volcano; central lagoon is former crater, islands are part of the rim |
| coralline | Guam | volcanic origin, surrounded by coral reefs; relatively flat coralline limestone plateau (source of most fresh water), with steep coastal cliffs and narrow coastal plains in north, low hills in center, mountains in ... |
| Cordillera | Arctic Ocean | ... landmasses; the ocean floor is about 50% continental shelf (highest percentage of any ocean) with the remainder a central basin interrupted by three submarine ridges (Alpha Cordillera, Nansen Cordillera, and Lomonosov Ridge |
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