Fifteen million years ago an island rose out of the sea off the west coast of Africa. Again and again ash and lava shot into the skies and plummeted back into the waves of the Atlantic in an inferno of fire and water, smoke and steam until, layer by layer, a black volcanic cone rose above the water. Lanzarote, the "Isla Negra". The island has never come to rest. The volcanoes remain active through to the present day and throw up faulted strata, whilst wind and water simultaneously brea…
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