Some have speculated that the Crater of Pantasma was formed when an over 500 m large meteorite struck into the Tertiary effusive layers of the volcanic mountains in the north of Nicaragua. The circular shape of the crater, the skew of its floor according to the spacious mountain slope and its apparently arbitrary situation supports the thesis of a meteorite impact. A central uplift is missing or may already be covered with sediments. An ejection ring is not recognizable clearly in the rough landscape. The size and the shape of the crater remind at the 10 km large and about one million years old crater of Lake Bosumtwi in Ghana. Its embedding into the landscape is nearly identical to the impact crater of Goat Paddock in Australia (5 km, up to 50 million years). The volcanic history of the whole region and the neighbourhood of an active volcanic zone suggest a volcanic origin, but don't prove it conclusively.

• http://en.wikipedia.org/wiki/Pantasma