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How deep is the loess layer in parts of southern Ningxia?
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Ningxia
Huang He (Yellow River) in Hui Autonomous Region of Ningxia, north-central China.
In southern Ningxia, which is part of the Loess Plateau, the region is covered by a thick layer of loess. In some areas, this deposit of wind-blown soil reaches depths of more than 300 feet (90 metres).1