| | Terrain (2005) | Terrain (2002) |
 |
Arctic Ocean |
central surface covered by a perennial drifting polar icepack that, on average, is about 3 meters thick, although pressure ridges may be three times that thickness; clockwise drift pattern in the Beaufort Gyral Stream, but nearly straight-line movement from the New Siberian Islands (Russia) to Denmark Strait (between Greenland and Iceland); the icepack is surrounded by open seas during the summer, but more than doubles in size during the winter and extends to the encircling 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) |
central surface covered by a perennial drifting polar icepack that averages about 3 meters in thickness, although pressure ridges may be three times that size; clockwise drift pattern in the Beaufort Gyral Stream, but nearly straight-line movement from the New Siberian Islands (Russia) to Denmark Strait (between Greenland and Iceland); the icepack is surrounded by open seas during the summer, but more than doubles in size during the winter and extends to the encircling 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) |
 |
European Union |
fairly flat along the Baltic and Atlantic coast; mountainous in the central and southern areas |
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 |
Gambia, The |
flood plain of the Gambia River flanked by some low hills |
flood plain of the Gambia river flanked by some low hills |
 |
Macedonia |
mountainous territory covered with deep basins and valleys; three large lakes, each divided by a frontier line; country bisected by the Vardar River |
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 |
Macedonia, The Former Yugoslav Republic of |
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mountainous territory covered with deep basins and valleys; three large lakes, each divided by a frontier line; country bisected by the Vardar River |
 |
Micronesia, Federated States of |
islands vary geologically from high mountainous islands to low, coral atolls; volcanic outcroppings on Pohnpei, Kosrae, and Chuuk |
islands vary geologically from high mountainous islands to low, coral atolls; volcanic outcroppings on Pohnpei, Kosrae, and Truk |
 |
Montserrat |
volcanic island, mostly mountainous, with small coastal lowland |
volcanic islands, mostly mountainous, with small coastal lowland |
 |
Nepal |
Tarai or flat river plain of the Ganges in south, central hill region, rugged Himalayas in north |
Terai or flat river plain of the Ganges in south, central hill region, rugged Himalayas in north |
 |
Puerto Rico |
mostly mountains with coastal plain belt in north; mountains precipitous to sea on west coast; sandy beaches along most coastal areas |
mostly mountains, with coastal plain belt in north; mountains precipitous to sea on west coast; sandy beaches along most coastal areas |
 |
Samoa |
two main islands (Savaii, Upolu) and several smaller islands and uninhabited islets; narrow coastal plain with volcanic, rocky, rugged mountains in interior |
narrow coastal plain with volcanic, rocky, rugged mountains in interior |
 |
Slovenia |
a short coastal strip on the Adriatic, an alpine mountain region adjacent to Italy and Austria, mixed mountains and valleys with numerous rivers to the east |
a short coastal strip on the Adriatic, an alpine mountain region adjacent to Italy and Austria, mixed mountain and valleys with numerous rivers to the east |
 |
Southern Ocean |
the Southern Ocean is deep, 4,000 to 5,000 meters over most of its extent with only limited areas of shallow water; the Antarctic continental shelf is generally narrow and unusually deep, its edge lying at depths of 400 to 800 meters (the global mean is 133 meters); the Antarctic icepack grows from an average minimum of 2.6 million square kilometers in March to about 18.8 million square kilometers in September, better than a sixfold increase in area; the Antarctic Circumpolar Current (21,000 km in length) moves perpetually eastward; it is the world's largest ocean current, transporting 130 million cubic meters of water per second - 100 times the flow of all the world's rivers |
the Southern Ocean is deep, 4,000 to 5,000 meters over most of its extent with only limited areas of shallow water; the Antarctic continental shelf is generally narrow and unusually deep - its edge lying at depths of 400 to 800 meters (the global mean is 133 meters); the Antarctic icepack grows from an average minimum of 2.6 million square kilometers in March to about 18.8 million square kilometers in September, better than a sixfold increase in area; the Antarctic Circumpolar Current (21,000 km in length) moves perpetually eastward; it is the world's largest ocean current, transporting 130 million cubic meters of water per second - 100 times the flow of all the world's rivers |
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Sudan |
generally flat, featureless plain; mountains in far south, northeast and west; desert dominates the north |
generally flat, featureless plain; mountains in east and west |
 |
Turkey |
high central plateau (Anatolia); narrow coastal plain; several mountain ranges |
mostly mountains; narrow coastal plain; high central plateau (Anatolia) |
 |
Vanuatu |
mostly mountainous islands of volcanic origin; narrow coastal plains |
mostly mountains of volcanic origin; narrow coastal plains |