| has gloss | eng: A subglacial mound (SUGM) is a type of subglacial volcano. These kinds of volcanoes form when lava erupts beneath a thick glacier or ice sheet. The magma forming these volcanoes were not hot enough to melt a vertical pipe right through the overlying glacial ice, instead forming rounded conical mounds of hydrated volcanic fragments called hyaloclastite and lava that solidified into pillow-shaped masses called pillow lava deep beneath the glacial ice field. An example of this confusion is Pyramid Mountain in the Wells Gray-Clearwater volcanic field of east-central British Columbia, Canada. |
