OPENING QUESTION: Please sketch the CSZ (do you remember what that is?) and show how it is responsible for creating Mt St Helens and other Cascade Range Volcanoes.
BONUS! Some of the carbon dioxide that gets released during a volcanic eruption comes from a very unusual source. Do you remember that? Include that in your sketches if you can.
WORK OF THE DAY:
Let's review THIS:

How many Cascade Volcanoes can you name?
What states have Cascade Range Volcanoes?
Please have a conversation with your group:
COMPARE (how they are similar) lahars with pyroclastic flows.
Now please CONTRAST (how they are different) lahars with pyroclastic flows.
WORDS OF THE DAY:
- Glacier
- Puget Sound Basin
- Fault
- Cascadia Subduction Zone
- Subduction Earthquake
- Lahar
- Pyroclastic Zone
- Tephra (Ash)
- Blast Zone
WORK OF THE DAY:
Mrs Smith was kind enough to share THIS with us today (courtesy of the Federal Emergency Management Agency!).
Althoug we are at no real danger from a volcanic eruption here in Gig Harbor, those guidelines apply to any number of natural disasters....let's take a look!
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Last Friday I briefly discussed the Eruption of the Nevada Del Ruiz volcano in Columbia in South America:

Let's take a look at THIS reading from Scientific American
Here is a geological hazard map showing how the Lahars flowed down existing river beds:

Lahar is an Indonesian Word for "mud flow". Not just any old mud flow but a mud flow that happens when snow and ice on a volcano *suddenly* melt during an eruption
Please take a look at THIS
Now let's review this animation (take from still pictures) of the May 18th, 1980 Mt St Helens Eruption
And this presentation too!
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