1
Stage 1 of 3
barqan
Kazakh · 1800s
"crescent dune"
the local name for the moving crescent dunes of the Central Asian deserts
2
Stage 2 of 3
barkhan
Russian · 1881
"crescent dune"
the naturalist Alexander von Middendorf introduced it as a scientific term in 1881, from dunes he studied in Turkestan
3
Stage 3 of 3
barchan
English · 1890s
"crescent dune"
taken into international geology; barchans have since been photographed on Mars
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