Stratovolcano and Shield Volcano Morphology, Eruptions, and Seismic Activity
Summary
Students compare and contrast the morphology, eruptions, and seismic activity of the 1980 Mount St. Helens eruption and the 1984 Mauna Loa eruption.
Context
Audience
The activity is used in an online undergraduate introductory physical geography course. The focus of the course is landforms and soils. The course is predominantly composed of non-majors.
Skills and concepts that students must have mastered
Students should be proficient in map reading and analysis and creating and interpreting simple graphs
How the activity is situated in the course
This is a stand-alone exercise that reinforces concepts introduced in lecture.
Goals
Content/concepts goals for this activity
- Become familiar with differences in topography and seismic activity for stratovolcanoes and shield volcanoes
- Calculate slope
- Calculate mass and volume
- Interpret topographic map data
- Plot and interpret seismic data
Higher order thinking skills goals for this activity
Other skills goals for this activity
Description of the activity/assignment
Before completing this exercise, students should already have completed a basic map reading and analysis exercise. For this exercise, students conduct a series of calculations on portions of topographic maps of Mount St. Helens pre-1980 eruption and Mauna Loa. They then read about the 1980 Mount St. Helens eruption and the 1984 Mauna Loa eruption to answer a series of questions. Finally, they plot seismicity data for the two eruptions and compare and contrast stratovolcanoes and shield volcanoes.
Determining whether students have met the goals
Students complete the exercise during the week it is assigned. Upon completion of the laboratory exercise, students must complete an online quiz that consists of the same questions in the exercise. The online quiz is within the Desire 2 Learn (D2L) online learning platform, so answers are automatically graded and imported into the student's grade book.
Teaching materials and tips
- Activity Description/Assignment: Stratovolcano and Shield Volcano Morphology, Eruptions, and Seismic Activity exercise (Microsoft Word 2007 (.docx) 3.8MB Nov23 14)
Instructors Notes:
This exercise was developed for an online class and intended for students to work independently. Full-size versions of the maps used to complete Part 1 are available for free download at https://www.usgs.gov/the-national-map-data-delivery/topographic-maps. Maps used for this exercise include Mount St. Helens, Washington 1958 1:62,500 scale USGS topographic map and Hawaii, Hawaii 1975 1:250,000 scale USGS topographic map. Alternatively, students could complete most of the analyses using Google Earth and the historic topographic map layers.