Volcanoes of the World
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Northern Virginia Community College *
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Geology
Date
Feb 20, 2024
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Uploaded by babradshaw04
Volcanoes of the World
This assignment is worth 115 total points with 30 points extra credit available!!!
Name: Brooke Bradshaw
By including your name above, you acknowledge that the work presented is your own.
Reference Table
Composition & Rock
Type
Magma Viscosity
VEI (Volcanic
Explosivity Index)
Volcano Types
Tectonic Location
Mafic – Basalt
Low
1-4 (Effusive)
Shield, Cinder, small Calderas
Ocean Hot Spots (Intraplate) & Divergent Boundaries
Intermediate – Andesite
Intermediate
5-6 (Explosive)
Stratovolcano, medium Calderas
Convergent Plate Boundaries
Felsic – Rhyolite
High
7 (Catastrophic)
Stratovolcano, massive Calderas
Convergent plate boundaries and Continental Hot Spots (Intraplate)
Follow along with the steps detailed on Canvas and also watch the video tutorial for specific directions.
Page 1
of 6
Part 1: Investigating Shield Volcanoes
Fill in the information for the two Shield Volcanoes listed and search for one of your own to provide the required details.
Volcano #1
Volcano #2
Volcano #3
Volcano Name
Mauna Loa
Reykjanes
Belknap
Location Hawaii, Pacific Ocean
Iceland
Oregon, United States
Dominant composition based
on rock type. Choose one: Basalt, Andesite, Rhyolite
Basalt
Basalt
Basalt
Summit elevation in meters
4170 m
140 m
2095 m
First Eruption/Last eruption?
8050 BCE/2022 CE
8000 BCE/
1831 CE
5050 BCE/480 CE
Tectonic setting PICK ONE
:
●
hot spot (intraplate)
●
divergent boundary (rift
zone)
●
convergent boundary (subduction zone)
Hot spot (intraplate)
Divergent boundary
(rift zone)
Convergent boundary
(subduction zone)
Highest VEI number
2
4
2
Explosivity correlation (from Reference Table). PICK ONE
:
Effusive, Explosive, Catastrophic
Effusive
Effusive
Effusive? – low VEI,
Shield, has Basalt, but
convergent
Insert an image (picture) of the volcano that captures the shape of the volcanic cone
EXTRA CREDIT FROM EXPLORING EACH VOLCANO IN GOOGLE EARTH (follow directions in Canvas for requirements)
Insert the Google Earth image of the placemark for this volcano
Name the plate(s) associated with this tectonic setting.
Pacific
North American and
Eurasian
North American and
Pacific
Page 2
of 6
Part 2: Investigating Cinder Cones (Pyroclastic Cones)
Fill in the information for the Cinder Cone listed and search for one of your own to provide the required details.
Volcano #1
Volcano #2
Volcano Name
Sunset Crater
Apagado
Location
Flagstaff, Arizona, USA
Chile
Dominant composition based on rock type. Choose one: Basalt, Andesite, Rhyolite
Basalt
Basalt
Summit elevation in meters
3850 m
1210 m
First Eruption/Last eruption?
1075 CE ± 25 years
590 BCE ± 175 years
Tectonic setting PICK ONE
:
●
hot spot (intraplate)
●
divergent boundary (rift zone)
●
convergent boundary (subduction zone)
Divergent boundary (rift
zone)
Convergent boundary
(subduction zone)
Highest VEI number
4
4
Explosivity correlation (from Reference Table). PICK ONE
:
Effusive, Explosive, Catastrophic
Effusive
Effusive? – low VEI,
Cinder, has Basalt, but
convergent
Insert an image (picture) of the volcano that captures the shape of the volcanic cone
EXTRA CREDIT FROM EXPLORING EACH VOLCANO IN GOOGLE EARTH (follow directions in Canvas for requirements)
Insert the Google Earth image of the placemark for this volcano Name the plate(s) associated with this tectonic setting.
North American and
Pacific
South American and
Nazca
Page 3
of 6
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Part 3: Investigating Stratovolcanoes (Composite volcanoes)
Fill in the information for the two Stratovolcanoes listed and search for one of your own to provide the required details.
Volcano #1
Volcano #2
Volcano #3
Volcano Name
Pinatubo
Popocatepetl
Agung
Location Philippines
Mexico
Indonesia
Dominant composition based on rock type. Choose one: Basalt, Andesite, Rhyolite
Andesite
Andesite
Andesite
Summit elevation in meters
1486 m
5393 m
2997 m
First Eruption/Last eruption?
7460 BCE ± 150 years/1993
CE
7150 BCE/2023 CE
1808/2019 CE
Tectonic setting PICK ONE
:
●
hot spot (intraplate)
●
divergent boundary (rift zone)
●
convergent boundary (subduction zone)
Convergent boundary
(subduction zone)
Convergent boundary
(subduction zone)
Convergent boundary
(subduction zone)
Highest VEI
6
5
5
Explosivity correlation (from Reference Table). PICK ONE
:
Effusive, Explosive, Catastrophic
Explosive
Explosive
Explosive
Insert an image (picture) of the volcano that captures the
shape of the volcanic cone
EXTRA CREDIT FROM EXPLORING EACH VOLCANO IN GOOGLE EARTH (follow directions in Canvas for requirements)
Insert the Google Earth image of the placemark for this volcano
Name the plate(s) associated with this tectonic setting.
Eurasian and Philippine
North American and
Cocos
Australian and Eurasian
Page 4
of 6
Part 4: Investigating Calderas
Fill in the information for the Caldera type volcano listed and search for one of your own to provide the required details.
Volcano #1
Volcano #2
Volcano Name
Crater Lake
Asosan
Location
Oregon, USA
Japan
Dominant composition based on rock type. Choose one: Basalt, Andesite, Rhyolite
Andesite
Andesite
Summit elevation in meters
2487 m
1592 m
First Eruption/Last eruption?
5900 BCE ± 50 years/
2850
BCE
8050 BCE/2021 CE
Tectonic setting PICK ONE
:
●
hot spot (intraplate)
●
divergent boundary (rift zone)
●
convergent boundary (subduction zone)
convergent boundary
(subduction zone)
convergent boundary
(subduction zone)
Highest VEI
7
3
Explosivity correlation (from Reference Table). PICK ONE
:
Effusive, Explosive, Catastrophic
Catastrophic
Intermediate? –
Caldera, Andesite,
Convergent, but low
VEI
Insert an image(picture) that captures the shape of the volcanic cone or size of the caldera
EXTRA CREDIT FROM EXPLORING EACH VOLCANO IN GOOGLE EARTH (follow directions in Canvas for requirements)
Insert the Google Earth image of the
placemark for this volcano
Name the plate(s) associated with this tectonic setting.
Juan de Fuca and
North American
Eurasian and Philippine
Page 5
of 6
Part 5: Summative Assessment (15 points)
Refer to your work from above, the following table and information in your text to answer these questions.
Composition & Rock
Type
Magma Viscosity
VEI (Volcanic
Explosivity Index)
Volcano Types
Tectonic Location
Mafic – Basalt
Low
1-4 (Effusive)
Shield, Cinder, small Calderas
Ocean Hot Spots (Intraplate) & Divergent Boundaries
Intermediate – Andesite
Intermediate
5-6 (Explosive)
Stratovolcano, medium Calderas
Convergent Plate Boundaries
Felsic – Rhyolite
High
7 (Catastrophic)
Stratovolcano, massive Calderas
Convergent plate boundaries and Continental Hot Spots (Intraplate)
1.
Review the tectonic locations for each type of volcano investigated. Compare the characteristics that you investigated of volcanoes found at rift zones (divergent plate boundaries) to those found at subduction zones (convergent plate boundaries). Compare the volcano type, explosivity and characteristic composition.
a.
Summarize the differences (5 points)
The volcanoes found at rift zones were a shield volcano and a cinder volcano. These were effusive, had a highest VEI
of 4, and were mainly Basalt. Much more commonly were the volcanoes at subduction zones, which generally had more Andesite rock. They also occurred in many types of volcanoes, mainly the stratovolcanoes and calderas. They varied in explosivity but were overall more explosive than the volcanoes found at rift zones. b.
Explain the reason(s)
for these differences based upon the tectonic environment in which they exist. (10 points)
These differences make sense because a divergent boundary doesn’t cause as much activity as convergent boundaries do. Divergent boundaries have plates that are separating, and magma rises to fill the gaps between the plates. Convergent boundaries have plates that are clashing, one plate having to go underneath the other, which usually creates a line of volcanoes.
Page 6
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