It was created by a massive explosive eruption of Mount Mazama about 6,800 years ago, during which it collapsed to create the caldera of Crater Lake.
Ash | ash | Ash Wednesday | Ash (band) | Wishbone Ash | Ash Ketchum | Leslie Ash | Ash, Surrey | Ash Ra Tempel | Volcanic ash | Knotty Ash | Vic Ash | Ash Grunwald | Timothy Garton Ash | Russell Ash | Mohammed ash-Sheikh | Daniel Ash | Ash'ari | Mount Mazama | Mountain Ash | Emerald ash borer | Ash Williams | Ash (tree) | Wood ash | wood ash | volcanic ash | The Ash Live in Chicago | Shvetsov ASh-62 | River Ash, Surrey | River Ash |