GEOS 218 Lecture Notes - Magma Chamber, Sulfur Dioxide, Hydrogen Sulfide
Document Summary
Was inactive for 700 years and people lost fear. What did you learn with the htew video about climbing into vesuvius for fumarole research? that by testing gas samples can tell you what is going on in the magma chamber. Water vapors or carbon dioxide will usually mean it is relatively calm, and sulfur dioxide or hydrogen sulfide could mean the volcano is getting ready to erupt. What are the most abundant elements in rocks? oxygen and silicon. Felsic means light colored minerals (continental) and mafic means dark colored minerals (oceanic). When magma cools different minerals form, mafic are first to form then felsic. Felsic has a lower melting point than mafic. Viscosity is the state of being thick, sticky, resistance to flow. Name something that is highly viscous and something with low viscosity. Something with low viscosity would be water, higher would be honey, and even higher would be tar.
