barchan chain
1Karakum Desert — or Kara Kum Desert Desert area, Central Asia. Located in Turkmenistan, it is bounded to the east by the Amu Darya valley. It can be divided into three major regions: the elevated and wind eroded Trans Unguz in the north, the low lying central… …
2Geology of Mars — Mars   Mars as seen by the Hubble Space Telescope Designations …
