Linear dunes are widely distributed in sand seas and are generally considered to be of depositional origin and formed by loose sand in a bidirectional wind regime (e.g., Tsoar, 1989; Lancaster, 2009; Rubin and Hesp, 2009). Linear dunes in the middle Qaidam Basin (Figs. 1 and 2) are thought to be of depositional origin due to a high content of total silt, clay, and salt, which can stabilize loose sands to form topographic shelters and induce subsequent deposition further downwind (Rubin and Hesp, 2009). These linear dunes migrate laterally at a rate up...
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