barchans

Once or twice we saw horsemen in the distance, on the low rocky barchans, and I heard for the first time names like "Kazak" and "Turka", but they kept a safe distance.

The Sky Writer Geoff Barbanell 2010

For anyone still doubting the possibilities for naturally complex dune systems, check the MOC Gallery of Martian Sand Dunes (I like this one of barchans in Nili Patera in 3D) in comparison with the Eolian Landforms chapter of the NASA/Goddard online book, Geomorphology from Space.

Archive 2004-02-01 Ray Girvan 2004

For anyone still doubting the possibilities for naturally complex dune systems, check the MOC Gallery of Martian Sand Dunes (I like this one of barchans in Nili Patera in 3D) in comparison with the Eolian Landforms chapter of the NASA/Goddard online book, Geomorphology from Space.

Cellular dunes? - and those glass tubes Ray Girvan 2004

These three rows of barchans were parallel, and at intervals of about from 300 yards to 500 yards from one another.

Across Coveted Lands or a Journey from Flushing (Holland) to Calcutta Overland Arnold Henry Savage Landor 1894

I noticed all over Persia, and in Beluchistan as well as here, that these sand barchans, or barchanes, will only form on level ground -- generally on extensive plains.

Across Coveted Lands or a Journey from Flushing (Holland) to Calcutta Overland Arnold Henry Savage Landor 1894

To the north of the salt wastes was another long belt of yellow sand extending for some 40 miles, upon which there was absolutely no vegetation, while intervening between the salt and this sand flat were numerous sand barchans, like horseshoes, with a gradual slope on the windward side (north) and a crescent hollow with a steep but not quite vertical bank on the lee side.

Across Coveted Lands or a Journey from Flushing (Holland) to Calcutta Overland Arnold Henry Savage Landor 1894

Some nineteen miles from Tretoh, where the hill range to the north became low, a few sand hills were to be seen, then where another gap existed in the range yet another long row of barchans stretched southwards.

Across Coveted Lands or a Journey from Flushing (Holland) to Calcutta Overland Arnold Henry Savage Landor 1894

The barchans averaged from 50 ft. to 100 ft. in height.

Across Coveted Lands or a Journey from Flushing (Holland) to Calcutta Overland Arnold Henry Savage Landor 1894

Most of these sand-barchans had a striking peculiarity.

Across Coveted Lands or a Journey from Flushing (Holland) to Calcutta Overland Arnold Henry Savage Landor 1894

I have also seen barchans, the inner crescent of which showed beyond doubt that when there is a prevalent wind from one side only, the above explanation, although less scientifically obscure and elaborate than most, applies, and, I think, it may eventually be found quite the most probable.

Across Coveted Lands or a Journey from Flushing (Holland) to Calcutta Overland Arnold Henry Savage Landor 1894