There's a legend every visitor repeats: "Lanzarote's sand is blown over from the Sahara". Lovely — and false. The golden sand of El Jable and the northern beaches comes from the sea right next door: it is shells, sea snails and the skeletons of marine creatures, ground down by the waves over millennia and pushed inland by the trade winds (los alisios). That "river of sand" — El Jable — crosses the entire island from Famara to the coast at Playa Honda, and in it the farmers grow supremely sweet sweet potatoes and the houbaras hide their nests. The Sahara does, mind you, send its dust from time to time with the calima (Saharan dust haze). But your feet, on the beach, are standing on pure Atlantic Ocean milled into flour.
Time to dismantle, with affection, the island's most repeated myth. The logic seems watertight: the Sahara is just over there, the wind blows, ergo the sand is African. But science tells a much better story. Take a handful of sand from El Jable or Famara and look at it up close — with a magnifying glass, if you have one: you'll see pearly fragments, little tubes, tiny spirals, perforated discs. It isn't desert dust: it is the remains of marine life. Mollusc shells, sea-urchin cases, calcareous algae that build skeletons of stone and, above all, foraminifera — microscopic organisms with little shells of their own that live in their millions on the seabeds around here. Lanzarote's golden sand is organogenic: the ocean makes it, not the Sahara. That is why it is golden-cream rather than reddish, and why it "crunches" differently.
The system works like a conveyor belt of millennia. In the bay of Famara, the northern swell grinds up and piles that biological material on the beach. When the tide goes out and the sand dries, the trade winds clock on: grain by grain, they push it inland. Over time — a great deal of time — that steady flow has created El Jable: a corridor of sands kilometres wide that crosses the island diagonally, from the north coast to the bay of Playa Honda and Guacimeta, where the planes land today. It is, literally, a river of sand flowing from sea to sea, at geological speed, passing in front of Sóo, Muñique and Tao.
That seemingly sterile river is a world. Moisture keeps beneath the sand, and the farmers have known it for centuries: in El Jable they grow — buried, protected from the wind by windbreaks of stone or rye — the island's most famous sweet potatoes, along with watermelons, pumpkins and tomatoes with a concentrated flavour the restaurants boast about on their menus. On the sand, the wildlife plays in expert mode: this is where the Canarian houbara bustard hides her nests, where the cream-coloured courser and the stone-curlew scurry about, and where specialist shrubs flower and pin down the dunes.
And the Sahara, then — does it send nothing? It sends something — but something else. The calima episodes bring ultra-fine dust in suspension, that yellow veil that sometimes blurs the horizon and leaves a film on the cars. That dust fertilises soils and seas (and produces science-fiction sunsets), but it doesn't build beaches: the next rain or the next alisio carries it away.
So now you have a better story than the legend to tell on the beach: you are lying on thousands of years of recycled ocean life, on the bank of a river of sand that is still flowing, right now, beneath your towels. The Sahara is close by — but this sand is one hundred per cent made in the Atlantic.