Volcano Lab Revised
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Central Piedmont Community College *
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111
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Geology
Date
Apr 3, 2024
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docx
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Geology 111 Volcanoes Around the U.S.
Most people don’t realize that volcanoes come in a wide variety of shapes, sizes and forms of explosiveness. There are about 170 potentially active volcanoes in the United States. Your assignment is to research four different volcanoes from around the U.S. The mission of the United States Geological Survey (USGS) Volcano Hazards Program is to enhance public safety and minimize social and economic disruption from volcanic unrest and eruption through our National Volcano Early Warning System. The program delivers forecasts, warnings, and information about volcano hazards based on a scientific understanding of volcanic behavior. Go to the USGS Volcano Hazards Program
(if you click on any volcano on this site, there is then a drop down menu to visit any other volcano) and Smithsonian Global Volcanism Program
(first go to the United States under Country to get started) to obtain information about four of these potentially dangerous volcanoes in
the U.S. and complete the following table and questions. Any other resources can also be used.
Consider the four images above (A, B, C and D) above and fill in the table on the following page. After completing the table answer the three questions about the volcanoes.
A) Mount Kilauea
C) Mono-Inyo Craters
D) Sunset Crater (Part of San
Francisco Volcanic Field)
B) Mount Hood
A
B
C
D
Location (U.S. State)
hawaii
oregan
california
Arizona
Volcano Type (Cinder
Cone, Stratovolcano,
Shield, or Volcanic Dome)
Shield
Stratovolcano
Lava dome
Volcanic field
Lava Type (Felsic,
Intermediate, or Mafic)
Mafic
Intermediate
felsic
Mafic
Lava Viscosity (Low,
Intermediate, or High)
Low
High
High
Low
Rock Composition
(Andesite, Basalt, or
Rhyolite)
Basalt
Andesite to dacite
rhyolite
Basalt
Elevation (feet)
4,009 ft
11,240 ft
9,173 ft
12,631 ft
Most Recent Eruption
(year)
June 2023 CE 1865 AD
1380 CE (or about
300 years ago)
1085 AD
Population Within 5 km
3,122
0
558
23,157
Plate Tectonic Setting
intraplate
Subduction zone
Rift zone
Rift one
Draw a small sketch of
the volcanoes’ area
and slope in
comparison to each
other (2 pts each)
A
B
C
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D
Questions:
1)
Using the USGS Volcano Hazards Program
, are there any volcanoes currently on Warning or Watch? What are the names of the volcanoes and what characteristics are they exhibiting to warrant the higher alert level? (4 pts)
There is only one watch volcano which is Mount Kilauea because of its recent eruption in June 2023. There was a
ground formation and an earthquake from mount Kilauea. But the magma has also slowed down. 2)
Choose two volcanoes and draw a profile (side) view of each volcano’s plate tectonic setting, labeling each profile with the arrows displaying plate movement direction, the type of crust on each plate, origin of molten rock, where volcano is located at Earth’s surface, and any significant geologic features. You only need two drawings, but be sure to name the volcano for each drawing. (4 pts)
3)
Which of these volcanoes do you consider the most hazardous? Explain why. What are 3 actions you would take to mitigate the impact of this volcano before it erupts? Be specific to the volcano mentioned for full credit. (8 pts) I would honestly consider mount Kilauea the most dangerous just because of its form. Not only was its last eruption really recent, but the volcano being kind of underground but still erupting on the surface seems very dangerous. Someone who does not know anything about volcanos may come across that and not understand how dangerous it is. Three ways I would take to mitigate the impact of the volcano before it erupts is definitely moving away from it, monitor it’s behavior on a reliable website, and make sure my surroundings are protected from its impact should it ever come near me.
USGS Volcano Hazards Program - https://www.usgs.gov/programs/VHP
Smithsonian Global Volcanism Program - https://volcano.si.edu/volcanolist_countries.cfm
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