GEOL 101 Lecture Notes - Lecture 5: Cinder Cone, Shield Volcano, Sunset Crater
Document Summary
Discuss and explain the factors that control the morphology of a volcano and the viscosity of its magmas. Predict whether a volcano will erupt violently or gently based on the types of magmas it erupts and its tectonic setting. Compare and contrast the different types of volcanoes (cinder cone, shield, and stratovolcano) Explain why volcanoes are linked to plate tectonics. Cone shaped structures created by many lava and pyroclastic material erupting onto the earth. 50 to 60 volcanoes erupt each year (gentle eruptions) All volcanoes are generated by build-up of erupted material. Determined by the composition of the magma/lava. Broad, domed, relatively flat, covers a large area. May or may not have a caldera at the summit. Large, cone shaped, steep, gentle sloping flats. Accumulation of gas rich intermediate to felsic lava/pyroclastic material. Viscosity: measure of a material"s resistance to flow. Has a significant role on the viscosity of all material. High silica (60% - 70% silica) = high viscosity.
