EARTHSC 2GG3 Lecture Notes - Lecture 10: Cerro Negro, Stratovolcano, Subduction

• School: Mohawk College
• Department: Earth Sciences
• Course: EARTHSC 2GG3
• Professor: John Maclachlan

Document Summary

September 27, 2012: shield volcanoes, shield volcanoes, hotspots ; mid-oceanic volcanic islands fluid basaltic lava low viscosity low volatile content, broad and gently sloping sides large volumes. Image: basaltic lava: courtesy of smithsonian institute. Image 2: mauna loa (hawaii), 1984: courtesy of usgs. In some eruptions, basaltic lava pours out from long fissures forming broad plateaus. Lava plateaus of this type can be seen in iceland. Image: laki fissure volcano, iceland: courtesy of usgs. Image: kilauea"s (cid:862)fire hose(cid:863) pours lava from a sea cliff: courtesy of smithsonian institute (http://www. mnh. si. edu/earth/text/4_2_5_1. html, cinder cones. Cinder cones: basaltic lava small size low viscosity: steep sides moderate volatile content, erupt over only one short period (a few months to a few years, hotspots, subduction zones, and continental rift zones. Image : cerro negro, nicaragua (the most active cinder cone volcano) Courtesy of k. segerstrom, usgs: composite, or stratovolcanoes.