1. Erg (landform)An erg (also sand sea or dune sea, or sand sheet if it lacks dunes) is a broad, flat area of desert covered with wind-swept sand with little or no vegetative cover. The term takes its name from the Arabic word ʿarq (عرق), meaning "dune field". Strictly speaking, an erg is defined as a desert area that contains more than 125 square kilometres (48 sq mi) of aeolian or wind-blown sand and where sand covers more than 20% of the surface. Smaller areas are known as "dune fields".
Read “Erg (landform)” on English Wikipedia
Read “砂砂漠” on Japanese Wikipedia
Read “Erg (landform)” on DBpedia
Read “Erg (landform)” on English Wikipedia
Read “砂砂漠” on Japanese Wikipedia
Read “Erg (landform)” on DBpedia
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