Celtic Sea  |
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| BT | Atlantic Ocean | | | .North Atlantic | | | ..Celtic Sea | | RT | English Channel | | SN | Body of water over the continental shelf between the S coast of Ireland and Brittany. It is arbitrarily divided from the English Channel by a line from Land's End to Ushant Island off Brittany. |
Central Basin  |
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| RT | Tennessee | | SN | Central Tennessee. Also in other areas. Indexed with county or state as applicable. |
Central Graben  |
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| RT | Germany | | | Netherlands | | | North Sea | | | Scotland | | SN | Extends from Viking Graben in N North Sea onshore to Netherlands and NW Germany. Indexed with North Sea and/or countries as applicable. Added to Thesaurus in 1993. |
Central Range  |
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| SN | Not a valid term for GeoRef. As of 1989, use Taiwanese Central Range for mountain range in Taiwan. Also see Central Cordillera or country. |
Central Valley  |
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| RT | California | | | Chile | | | Sacramento Valley | | | San Joaquin Valley | | SN | Valley of Sacramento and San Joaquin rivers in California, and a 600 mile long valley between the Andes and the Coastal Range in central Chile. Before 1978, also search Great Valley for the valley in California. Indexed with California and/or Chile as app |
Centre de Recherches Petrographiques et Geochimiques  |
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| USE | CRPG |
Centre National de la Recherche Scientifique  |
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| USE | CNRS |
centrum (seismology)  |
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| USE | focus |
Cerro Negro  |
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| RT | Nicaragua | | | Orinoco Belt | | | Venezuela | | | volcanoes | | SN | Volcano. N12#DG30' W86#DG42', NW Nicaragua. Also used for a region with an oil sands deposit in Orinoco River basin, E Venezuela. After 1992, use Cerro Negro Venezuela for the town. May occur in other locations. Search in combination with country or state |
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