11. Tunnel valleys were formed by subglacial erosion by water. 12. Subglacial eruptions occur when a volcano erupts under ice.13. Antarctica has several subglacial lakes underneath its ice sheet. 14. Subglacial volcanic eruptions are identified by layers of high concentrations of NO and SO.15. These volcanics were erupted under more than of glacial ice to produce subglacial eruptions. 16. Instead, the eruption produced a subglacial mound. 17. The steep profile of the volcanic field and its subglacial landforms support this hypothesis. 18. Its source is a subglacial pool, of unknown size, which sometimes overflows. 19. The test returned a clean subglacial sample from the outflow channel from Blood Falls. 20. She is one of few women working on technology development for exploring subglacial lakes.
