Climbers peer into the 700-m-wide summit crater of Mount Fuji from its E rim. More than 100,000 people ascend its slopes yearly during the 2-month summer climbing season. A white meteorological observatory (upper right) sits at the summit, which is 240 m above the crater floor. A red oxidized scoria layer that caps the rim of the summit crater was erupted about 2,100 years ago.

Photo by Lee Siebert, 1963 (Smithsonian Institution).

Keywords: stratovolcano | crater | stratigraphy

Fujisan