Must complete both Discussions
Discussion 1: Subduction Zones
OPTION A: What was something from the lesson/lab this week that was difficult for you? (This could be a difficult concept, an exercise from the lab that was confusing, or you just couldnt figure out the answer to, etc.) Describe your difficulty. Were you able to overcome it? If so, how? If not, what help do you need?
OPTION B: If nothing seemed particularly difficult, then pick a concept or idea that you learned for the first time this week that interested you. Did this idea debunk a preconceived notion? Why did it interest you? Have you further your learning about it by looking up additional information? If so, please share! If not, do you have any additional questions about it? What else would you like to know?
Discussion 2: Volcano Hazards
For this discussion, you do NOT have to start your own thread. You may, if you choose, start a new thread, or you can reply to a pre-existing thread. However, for full credit, you must participate twice (both of which may be replies).
If you are starting a new thread, please respond to the following scenario/question: You will need to do a little Internet research for this discussion. Study Mount Rainier and Craters of the Moon Lava Field, two different dormant volcanic areas that have experienced active activity in the recent past.
Mount Rainier is a stratovolcano that sits very close to the Seattle-Tacoma area. It is covered with glaciers and rivers. Its last eruption was about 11,000 years ago.
Craters of the Moon (CoM) is a location that has experienced several Hawaiian and Strombolian-style eruptions from at least 60 different fissures, and cinder and spatter cones over the past 15,000 years. Geologists have estimated its recurrence interval as being about 2,000 years, with the most recent eruption occurring about 2,000 years ago! Although the exact vent(s) and flow directions might not be reliably predicted, the eruption(s) will not catch us off guard. Geologists will have plenty of forewarning before the eruption begins. Note that the eruption(s) at CoM will be very similar in style and impact as the recent eruption in Iceland.
Use what youve learned about the different types of lava and volcanoes to compare and contrast how these two volcanic scenarios might impact society and the economy. What are the different risk factors with each, and why are they different? Which one do you think will be worse? Might either one have positive impacts?
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