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
Erg (tug) of Canada, which kept records of the activity in the harbour, advised that from 1940 to 1943, there were at least 12 vessels involved in accidents within Halifax Harbour. Vessels such as "Camperdown", "Claire Lilley" and "Nueva Indalucia" ran aground, whereas others such as "Otter", and "Trongate" caught fire and sank (or, in the case of "Trongate", was made to sink as the flames were completely out of control). In 1940, "Herbidean" was sunk by the British ship "Esmond"; a forerunner to the fate of "Erg". On June 6, 1943, "Erg" was carrying workers and equipment (air compressors and electric