Barringer Meteor Crater. Near Winslow, AZ. About 1.2 km across and .2 km deep. An impact about 25,000 years ago. The meteor that caused it is estimated at 50 meters diameter which would have weighed about 300,000 tons. Photo by Brad Snowder.

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Bernhard Edmaier GREEN ISLAND IN THE DESERT Trees and bushes are densely packed in the centre of the vast Wolfe Creek Crater, made by a meteorite in Western Australia some 300,000 years ago. The ridge of the crater, and the surrounding area, by contrast, are only sparsely vegetated. The crater has a diameter of about 850 metres (half a mile) and is one of the largest in the world.

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Molokini Crater, Maui

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