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44:55 EPS 131 Lecture 16 (Third Part) Lecture 17 EPS 131 Lecture 16 (Third Part) Lecture 17	EPS 131 Lecture 16 (Third Part) Lecture 17 EPS 131 Lecture 16 (Third Part) Lecture 17 atmosphere dioxide carbon layer kilometers eruption earth radiation lot valley ozone lake lava caldera stratosphere boundary eruptions yellowstone light layers From John Rundle 0 likes 6 plays 0
46:08 EPS 131 Lecture 16 (Second Part) EPS 131 Lecture 16 (Second Part)	EPS 131 Lecture 16 (Second Part) EPS 131 Lecture 16 (Second Part) eruption volcano eruptions volcanoes ash island meters town supervolcanoes caldera st thing side helens kilometers earth krakatoa region 26th middle From John Rundle 0 likes 11 plays 0