1. Introduction to Volcanoes http://earthref.org/SCC Scripps Classroom Connection

2. Shield Volcano  Like a soldier’s shield on the ground  Wide base, shallow sides  Produces fast-flowing lava  Not explosive (mostly) !! Scripps Classroom Connection http://earthref.org/SCC

3. Structure of a shield volcano Shield Volcano  Layers of cooled lava  Eruptions can occur at summit and side vents  Largest volcanoes on Earth -Mauna Loa, Hawaii: 300 km wide at it’s base (on the sea floor) Scripps Classroom Connection http://earthref.org/SCC

4. Lava from Kilauea, Hawaii Eruption Scripps Classroom Connection http://earthref.org/SCC http://www.youtube.com/watch?v=5hE2DZdl0IA

5. Aerial footage of Kilauea Eruption Scripps Classroom Connection http://earthref.org/SCC http://www.youtube.com/user/ActualidadRT?v=n61bHSCygS E&feature=pyv&ad=7259836166&kw=volcanos

6. Stratovolcano  Classic volcano look  Gentle slopes at bottom, steep slopes at top  Alternating layers of lava and rock fragments (pyroclastics)  Explosive!!!! Scripps Classroom Connection http://earthref.org/SCC

7. Stratovolcano structure Scripps Classroom Connection http://earthref.org/SCC

8. Pyroclastic Flow ● Pyroclastic flows contain a mix of ash and rock fragments Scripps Classroom Connection http://earthref.org/SCC Pyroclastic Flows

9. Cinder Cones Symmetrical, tall cones Steep sides Made of shattered bits of lava Highly explosive Scripps Classroom Connection http://earthref.org/SCC

10. ● Three volcano types 1. Shield Volcano -Layers of lava flows, non-explosive 2. Stratovolcano -Alternating lava and pyroclastic layers, explosive 3. Cinder Cones - Ash and fragmented lava, explosive Scripps Classroom Connection http://earthref.org/SCC Conclusions