Iturralde crater
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Iturralde Crater is an 8-kilometre diameter circular geophysical feature in Madidi National Park in the Bolivian portion of the Amazon Rainforest, first identified from Landsat satellite imagery in 1985. Wikipedia
Coordinates: 12°35.2′S 67°40.5′W / 12.5867°S 67.6750°W
Age: 11,000 to 30,000 years ago; Late Pleistocene