Ice volcano
conical mound of ice formed over a terrestrial lake via the eruption of water and slush through an ice shelf
en-US/ˈaɪs vɑlˈkeɪnoʊ/
en-GB/ˈaɪs vɒlˈkeɪnəʊ/
conical mound of ice formed over a terrestrial lake via the eruption of water and slush through an ice shelf