The Sahara: a green and pleasant land
HistoryExtra podcast
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The Sahara Landscape
The sahara has been tetonically stable for thousands of millions of years. It's suffered prolonged erosion, occasional incursions of the sea. You have a former river valleys, which are now infilled and partly covered in junes. E have great volcanoes rising up to three thousand meters or so. And it's on a grand scale.
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