Introductory Geology




Project - Volcanoes



Part 3 : Distribution of Active Volcanoes



Volcano
World was one of the first geoscience resources
on the Internet. For this exercise you will need a map showing plate boundaries.
Here is a small version or a large
one either of which can be printed from your browser; [if you print
from the browser, turn the large image on its side and reduce the size to
about 75% for the best effect)]. Alternatively you can copy the larger figure
(1.15) on the inside cover of the text.



 



Look at the Update
on Current Volcanic Activity. Prepare a table in which you list the
10 most recent volcanic events prior to October 1, 1998:









Location
Composition
Explosivity Index
Remarks









Under the Remarks column tell whether the volcano is located at a plate
boundary or within a plate. If the volcano occurs at a plate boundary tell
what kind of boundary.



Locate each of these events with a red circle on your reference map.



Questions



 



    
  
  1. What is a hot spot? Mark the location of a proposed hot
  spot with a purple
  circle on your reference map.
  
  2. Describe the plate tectonic setting of the Cascade Mountains.
  
  3. Describe the orientation of the volcanoes of the Cascades.
  How far (on average) are the Cascades from the subduction zone(s)? Speculate
  as to what controls the distance between a subduction zone and the volcanoes?
  
  4. At the Volcano
  World site is a list of volcanic activity from about 1995 to the present.
  About how many eruptions have been recorded each month since 1995?
  
  5. What is the range of the numbers of eruptions : ______
  (lowest) to ______ (highest). Predict how many eruptions you think will
  occur between October 1, and November 1, 1998.
  
  6. add the month of October 1998 eruptions to the table
  and locate them in blue
  
     




Field trips are the geologists counterpart of a case history.
Take some time and Virtually
Climb Stromboli.



Answer the following questions:



 



    
  
  1. Where is Stromboli? Locate it on your map in orange.
  
  2. What type of volcano is Stromboli?
  
  3. How many meters will you climb by the time you get to
  the top?
  
  4. If you enjoy this way to learn, you might want to Virtually
  climb the Vancori-summit!
  
     




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