Below both Mýrdalsjökull and Vatnajökull ice-
caps there are vast glacial outwash plains, sandur, which stretch from the glacial margins to the sea.
Dust from the sandur plains
can be
carried far from the shore by strong northerly winds. This is quite frequent but has
been particularly marked now, with a dust plume reaching easily a few hundred kilometers from the south
coast.
Iceland's southern
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