Erg (landform) and western Asia, and Central Australia. In South America, ergs are limited by the Andes Mountains, but they do contain extremely large dunes in coastal Peru and northwestern Argentina. They are also found in several parts of the northeast coast of Brazil. The only active erg in North America is in the Gran Desierto de Altar () that extends from the Sonoran Desert in the northwestern Mexican state of Sonora to the Yuma Desert of Arizona and the Algodones Dunes of southeastern California. An erg that has been fixed by vegetation forms the Nebraska Sandhills (). Sand seas and dune
Geography of French Guiana (widely scattered), cinnabar, kaolin, fish, [shrimp], rice, bananas. Arable land: 0%.<br> Permanent crops: 0%.<br> Permanent pastures: 0%.<br> Forests and woodland: 0%.<br> Other: 10% (1996 est.).<br> Irrigated land: 20 km² (1993 est.).<br> Natural hazards: high frequency of heavy showers and severe thunderstorms; flooding.<br> Environment - current issues: NA.<br> Geography - note: mostly an unsettled wilderness. Geography of French Guiana French Guiana is an overseas region of France, located on the northern coast of South America between Suriname and Brazil. See also the article on the geography of Suriname. Northern South America and part of Caribbean South America, bordering the North Atlantic