13 Nov '17, 3pm

#NASA

The scale and form of many impressive features on Earth’s surface can only be fully appreciated through an overhead view. The astronauts onboard the International Space Station may enjoy the best overhead view of all. The Zagros Mountains of southeastern Iran are the location of numerous salt domes and salt glaciers , formed as a result of the depositional history and tectonic forces operating in the region. While many of these landscape features are named on maps, the salt glacier in this photograph remains unnamed on global maps and atlases. The vaguely hourglass (or bowtie) shaped morphology of the salt glacier is due to the central location of the salt dome, which formed within the central Zagros ridge crest (top and lower left). Salt extruded from the dome and then flowed downslope into the adjacent valleys. For a sense of scale, the distance across the salt glacier f...

Full article: https://earthobservatory.nasa.gov/IOTD/view.php?id=91264&...

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