EARTHSC 2GG3 Lecture Notes - Lecture 10: Creative Commons License, Viscosity, Rhyolite

• School: McMaster University
• Department: Earth Sciences
• Course: EARTHSC 2GG3
• Professor: Sergei Basik

Document Summary

Image : 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, 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. Courtesy of k. segerstrom, usgs: composite, or stratovolcanoes. Stratovolcanoes: the classic volcano, cone-shaped: moderate viscosity, moderate slope, consist of layers of lava, fragmental debris, and ash moderate to high volatile content. Image : popocatepetl volcano, mexico: creative commons license, andesitic lava the most violent volcanoes location - subduction zone. An absence of activity for tens of thousands of years does not indicate that a volcano is no longer active: lava domes.