The sand volcanoes in the area are due to the earthquakes in the past - soil liquifaction.
Description
A sand volcano or sand blow is a cone of sand formed by the ejection of sand onto a surface from a central point. The sand builds up as a cone with slopes at the sand's angle of repose. A crater is commonly seen at the summit. The cone looks like a small volcanic cone[2] and can range in size from millimetres to metres in diameter.
References
https://en.wikipedia.org/wiki/Sand_boil
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