 SMG 7 >
The Congro and Nenúfares lakes occupy a maar-type explosion crater associated with a hydromagmatic eruption on the “Achada das Furnas†plateau, controlled by NW-SE fractures. The crater, 500 m diameter and 120 m deep, is imprinted in the flat surrounding area, and was formed about 3,900 years ago.
 37º 45'22''N 25º 24'26''W > SEE MAP
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