GEOL 1001 : Exam 2
Document Summary
Andesite not going to flow far: 1c. Rhyolite not going to flow far: blockier volcanic products, pyroclastic, initially, contents under pressure, explosion of gas (reduce pressure, 2a. Like a landslide caused by volcano: volcanic gas, up to 9% of lava is gas, more sio2 = more gas, h20, co2, so2, h2s, vesicles, holes in rock. Types: shield, low viscosity magma, wide, enormous, many eruptions, cinder cones (scoria, made of scoria, cone-shaped pile, 1 or few eruptions, strato or composite, huge volcanoes, taller, alternating pyroclastic/lava. 1) damage aircrafts: add weight (because ash gets in engines) 2) change of climate: blocks sunlight, global cooling can last for 10"s-1000"s of years. How to prevent hazards: volcano monitoring, observe volcano, signs of life. Monitor gases: *** look for any change **, we usually know if an eruption will occur, just not the sure when.
