Grand Erg Occidental Grand Erg Occidental The Grand Erg Occidental (, al-ʿIrq al-Gharbī al-Kabīr), (also known as the Western Sand Sea) is the second largest erg in northern Algeria after the Grand Erg Oriental. It covers an area of approximately . The sand dunes in the erg are formed by the wind, and can be up to high. Certain crescent-shaped dunes, known as barchans, are actually mobile; the wind can push these dunes as much as 20 to 30 m (65-100 ft) in one year. It is a desert natural region that receives less than 50 mm (1,96 in) of rainfall per year.
Erg (tug) Erg (tug) Erg was a vessel built and owned by Halifax Steamship Ltd. in 1915. She was used to ferry workers across the harbour to vessels under repair during the Second World War. "Erg" was sunk in the Halifax Harbour three times and is currently located in the Bedford Basin. "Erg" was originally a steam tug called "Sambro" and was built by the Halifax Shipyard in 1915. She was one of the earliest steel vessels to be built in Halifax. "Sambro" was 55 feet long and almost 15 feet wide, with a depth of 7 feet and her maximum tonnage