[edit] Africa. The major ergs of the Saharan region. Navajo Sandstone (former Jurassic age erg has since formed sandstone); Nebraska Sand Hills,
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en.wikipedia.org/wiki/List_of_ergs
en.wikipedia.org/wiki/List_of_ergs
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But, just like the less dry areas of Africa, the Sahara is a place of changing topography, from rocky stream beds to powdery piles of sand. ERGS: Otherwise known as sand seas, ergs are the Saharan dunes of popular imagination. They cover about 20 percent of the Sahara and can stretch for hundreds of miles at heights of...
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www.pbs.org/wnet/africa/explore/sahara/sahara_topograph...
www.pbs.org/wnet/africa/explore/sahara/sahara_topography_lo.html
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'Africa, Libya, Sahara, Erg Ubari, Sand dune structures in desert' stock image by Digital Vision. x15275715 Fotosearch Stock Photography and Stock Footage...
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www.fotosearch.com/FSD360/x15275715/
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Willy Water Bug; Parker Brothers' Ouija Board; ; With massive toy recalls on every parent's mind, I've started to reminisce about the gizmos and games that adversely affected me as a child. True, I never suffered from lead poisoning or ate something that was coated with a date rape drug, but there were quite a few toys...
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geekparenting.com/2007/11/29/top-5-demented-toys-that-s...
geekparenting.com/2007/11/29/top-5-demented-toys-that-scarred-me-for-life.aspx
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Wilson [1] estimated that at least 1 million years are required to build ergs with very large dunes, such as those on the Arabian Peninsula, in North Africa, and in central Asia.
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www.agc.army.mil/research/products/desert_guide/lsmshee...
www.agc.army.mil/research/products/desert_guide/lsmsheet/lsseas.htm
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A dune ridge in Erg Chebbi, Morocco, Africa. [Credits : Rosino] in a desert region, area of large accumulation of sand, generally in the bottom of a huge...
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www.britannica.com/EBchecked/topic/191273/erg
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World's largest desert. PHOTO. Article in the LookLex / Encyclopaedia The Sahara, with a size of 8.6 million km², is the world's largest desert, covering large parts of North Africa. Around 4 million people live here. Its maximum length is 4,800 km, running from west to east, and up to 1,200 km from north to south.
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i-cias.com/e.o/sahara.htm
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The two major monsoon systems on Earth are in northern Australia and West Africa. Lesser monsoon systems affect the deserts of central Asia. The southeast trade winds of the southern Indian Ocean provide heavy summer rains in India when they move onshore. Sand seas are called ergs in North Africa (Wilson, 1973).
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geoinfo.amu.edu.pl/wpk/geos/GEO_8/GEO_CHAPTER_8.HTML
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Mars Orbiter Laser Altimeter Observations of the North Polar Cap and Clouds on Mars Such properties are similar to some forms of terrestrial sand dunes, especially those that form sand seas or ergs in North Africa deserts.
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mars.jpl.nasa.gov/mgs/sci/mola/agu_s98.html
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