Mount Haddington formed during the Miocene and Pliocene epochs and it has had subglacial eruptions which formed tuyas (a distinct, flat-topped, steep-sided hill when lava erupts through glaciers or ice sheets) but recent eruptions produced tuff cones on its slopes.
Mount Haddington formed during the Miocene and Pliocene epochs and it has had subglacial eruptions which formed tuyas (a distinct, flat-topped, steep-sided hill when lava erupts through glaciers or ice sheets) but recent eruptions produced tuff cones on its slopes.