Kerid was said to be a cone volcano that erupted and emptied all of its magma reserve. This caused it to collapse into an empty magma chamber, thus creating a caldera.
The crater is about 180 feet deep, 560 feet wide and about 890 feet across. The middle of the crater is a beautiful aquamarine lake that you can walk around and explore. It is relatively shallow, depending on the rainfall (about 7 to 14 meters deep). It would take you about 20 minutes to walk around the crater and hike down to the lake.
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