A supraglacial boulder of andestitic lava on the Crater Lake Glacier, derived from rockfall originating in the cliffs in the background. Karen Williams, author of ‘Volcanoes of the South Wind’ is standing beside the boulder. |
A supraglacial boulder of andestitic lava on the Crater Lake Glacier, derived from rockfall originating in the cliffs in the background. Karen Williams, author of ‘Volcanoes of the South Wind’ is standing beside the boulder. |