GEO 101 Lecture Notes - Lecture 9: Subduction, Volcanism, Viscosity
26 Jul 2020
School
Department
Course
Professor
Document Summary
Stresses build up between the plates as one plate passes another. They snag and grind, allowing energy to build up. This energy is shock or seismic waves. The amplitude of the waves are attenuated (or lessen) as they move away from the source. 80% of these earthquakes are shallow (< 100 km deep) One lithospheric plate moving under another plate. One lithospheric plate moving under shifting within a tectonic plates- at faults. Vulcan= roman god of fire (and smithing), also fire, flames, volcano . Active= a volcano that has erupted in recorded history. Dormant= a volcano that has not been seen to erupt but it shows evidence of. Extinct= a volcano that shows no sign of life and exhibits evidence of long-term recent activity weathering and erosion. Gasses are least likely to escape from magma with high viscosity. Lava flows gently and forms large sheets. Form from fluid basaltic, low silica lava. Aa- less fluid and hardens a bit craggy.
