البراكين في كندا ويكيبيديا
Subglacial eruptions occur when lava erupts under large portions of glacial ice. As lava erupts under a large glacier, the heat of the lava would immediately start to melt the overlying glacial ice to produce resulting meltwater would quickly harden the lava to produce pillowshaped masses called pillow places, the pillow lava will fracture to create other types of ...