Volcano Lab using Google EarthTm
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Feb 20, 2024
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Volcano Lab using Google EarthTm
Rhett McBride
Date 1/22/2024
Questions: 1. Navigate to Santiago, Chile, in South America by typing in the city and country in the search bar on the left. Center the image so that the capital, Santiago, is in
your screen at an eye altitude of ~1000 km. This is done by using the -/+ on the bottom right of the screen and watch the numbers where it says camera. (the names of the capitols will appear as you zoom in). Make sure that north is at the top of the image. a. Tilt the image by hitting the 3D button so that you can look northward along the South American coast. Briefly describe the major tectonic features the South American Plate, the Nazca Plate and the Antarctic Plate. This triple junction is unusual in that it consists of a mid-
oceanic ridge
(landforms) that you see. (5 pts) The Andes Mountains, a result of the Nazca Plate subducting under the South American Plate, and the coastal plains leading to cliffs.
2. Now navigate to Volcan Descabezado Chico (-35.58, -70.75), it is best to stay in 3D mode (you can go directly there by typing in the coordinates in the search bar at the upper left side of the screen, make sure to put in the negative signs or you will be at the wrong location). This puts you on the rim of the volcano. a. Maximum height (elevation) of the volcano above sea level (at the rim): 10,764 feet or 3281 meters
. (2 pts) i. To get the height you will need to move the mouse over the area and then look at the number that is at the bottom far right of the screen. b. Describe the overall shape of Descabezado. An almost shaped triagle but with a hole in the most top part of it.
(5 pts) c. Tell
what type of volcano it is, you can do an internet research for this information. rhyodacitic stratovolcano
(5 pts) 2 d. Zoom out and examine the region. Describe the likely
tectonic setting of the volcanoes of the Andes Mountains (what plates are interacting).
The Andes Mountains are part of the Southern Cordillera formed from subduction zone volcanism at the convergent boundary of the Nazca plate and the South American plate. Hint: is there a deep ocean trench to the west of the mountains? Yes (5 pts) 3. Navigate to Mt. St. Helens, Washington, by typing in the name in the search bar. This
puts you on the rim of the crater. a. Maximum height (elevation) of the volcano above sea level: 2,950
meters. (2pts) b. Describe the overall shape of Mt. St. Helens. conical, youthful volcano
(5 pts) c. Zoom out to at least 365 km on the camera and examine the region. Are there any other volcanoes nearby?
Yes
,
Mount Hood
.
Describe the likely tectonic setting of the volcanoes of the Cascade Range.
the Juan de Fuca (oceanic) plate dives beneath the North American (continental) Plate.
Support your answer with observations on the major tectonic landforms of the region. (5 pts) d. What type of volcano is Mt. St Helen based on size, shape, and composition? stratovolcano (You can use the internet or refer to the lesson to help you.) (5 pts)
4. Navigate to Mauna Loa on the BIG island of Hawaii (central Pacific Ocean) (19.4715, -155.59039). a. Maximum height (elevation) of the volcano: 4,169.4 meters. (2 pts) b. Describe the overall shape of Mauna Loa. broad, rounded slopes
(5 pts) 3 c. Zoom out and examine the region. Describe the likely tectonic setting of the Hawaiian Islands. hot spot occurring in the middle of the Pacific Plate
(Hint: think back to your plate tectonic lessons.) Support your answer with observations on the major tectonic landforms of the region. (5 pts) d. What type of the volcano is Mauna Loa, based on size, shape, and composition? shield volcano
(5 pts) .
5. Navigate to Mt. Fujiyama, Japan (35.364, 138.731). a. Maximum height (elevation) of
the volcano above sea level: 3,776
meters. (2 pts) b. Describe the overall shape of Mt. Fujiyama. Its current beautiful cone shape
(5 pts) c. Zoom out and examine the region. Describe the likely tectonic setting of the volcanoes in the Japanese region. convergent plate boundary during long geohistorical ages. This means that the Japanese islands are built under the subduction tectonics. The oceanic plate consists of the oceanic crust and a part of the mantle beneath it.
Support your answer with observations on the major tectonic landforms
of the region. (5 pts) d. What type of the volcano is Mt Fuji, based on size, shape, and composition? stratovolcano (5 pts) 6. Navigate to Mt. Alayta, Ethiopia (12.887, 40.573). a. Maximum height (elevation) of the volcano above sea level: 1,501
meters. (2 pts) b. Describe the overall shape of Mt. Alayta. a massive shield volcano
(5 pts) 4 c. Zoom out and examine the region. Describe the likely tectonic setting of the volcanoes in the region It is part of the border line between the African Tectonic Plate and the Arabian Tectonic Plate. This is location between the two plates is common for volcanoes, which usually tend to form along converging plates.
(what plates are meeting and what type of opening caused the volcano). Support your answer with observations on the major tectonic landforms of the region. (5 pts) d. What type of volcano is Mt. Alayta, based on size, shape, and composition? shield volcano
(5 pts) 7. Summarize volcano type/composition relationships. a. Shield volcanoes usually have a convex shape and a gentle slope. (5 pts) b. Composite volcanoes usually have a conical shape and a steep slope. (5 pts)
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