If you happen to disturb the "Roaring Sand Dunes" which are located on the western side of the Langeberg Dunes in the Northern Cape Province, you will hear extraordinary sounds that vary from deep roaring, whistling, squeaking and humming...
The roaring sands derive from an extraordinary group of white dunes, more or less 12km long and 3km wide. They contrast with the principal and extraordinary red dunes of the Northern Cape Province which enclose them. It is alleged that the white dunes were formed over early streams of fresh water that leached out the red iron-oxides.
The sounds are produced in various ways such as stroking the fingers through the sand, scooping a handful of sand, walking through the sand and sliding down a dune. Strong dry windy nights also produce an "eerie moaning". On the other hand, very cold weather or rain will mute the sound. The exact cause of the sounds made by the dunes is not yet fully understood.
As a souvenir, a sample of the amazing roaring sands can be placed in fruit conserving jars, attached lid to lid with a finger sized hole, having been cut through the center of them resembling something similar to an egg timer. If the jars are inverted, the sand will run through the hole and make its amazing roaring noise. Nevertheless, if the jars are not properly or firmly sealed before parting the dry atmosphere of this district, the sand will absorb moisture from the air, and it will not make those amazing sounds...
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