The circular topographic feature is 7Â km in diameter, although due to the amount of erosion the original crater may have been larger.

The original crater was probably over high; higher than Kilimanjaro.

The site is heavily eroded and it has been suggested that the original crater was slightly larger, at around 20 km diameter.

This process continued from 1927 through 1962 so that the original crater became a 20 acre lake with an average depth of 25 feet.

Crusoe's new position was about a hundred yards from the original crater.

They looked at a chart showing the two rings around the original crater and the charges that had already exploded.

This gotta be the edge of one of the original craters.

Periods of glaciation since then have removed the original crater, leaving a lake approximately 2.2 miles across and 100 meters deep at its center.

However, this is only a relic of the original crater after considerable erosion.

Little remains of the original crater, besides a low curving ridge.