Chapter 1: Section 7 - Volcanic Landforms

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In this section you will find materials that support the implementation of EarthComm, Section 7: Volcanic Landforms.

Learning Outcomes

  • Develop a model and a topographic map of a volcano.
  • Analyze contour data on topographic maps to identify volcanic landforms.
  • Identify cause and effect relationships between magma composition and types of volcanoes.

Inquiring Further

  1. To examine a topography map of a Cascade volcano, visit the following web site and choose one of the five famous volcanoes:

Cascade Volcanoes from Lewis and Clark's Expedition, USGS
Select among Mt. Adams, Mt. Hood, Mt. Jefferson, Mt. Rainier, and Mt. St Helens, then scroll down to the images section to find a topographic map.


To learn more about this topic, visit the following web sites:

Topographic Maps

Topographic Map Symbols, USGS
Read more about topographic maps, view and learn what different symbols mean, and find out how maps can be purchased.

Dignital Elevation Model

Digital Elevation Model, USGS
Learn how lasers can be used to scan volcanoes to measure the elevation of the ground surface and generate very high-resolution models. Unlike photographic methods, the lasers are able to travel through tree canopy to the ground to reveal features of the earth's surface that are obscured by vegetation.

Magma Composition

Magma Composition, USGS
Find out more about how the chemical composition of magma varies in igneous rocks. The discussion is not limited to just extrusive rocks, but includes intrusive rocks as well.

Magma and Rocks FAQs, University of Oregon
How does texture and composition relate to igneous rocks? Find out here.

Types of Volcanic Landforms

Types of Volcanoes, Volcano World
An index page with links to short descriptions about different volcanic landforms. This site describes the limitations of thinking about only a few kinds of volcanic landforms.

Principal Types of Volcanoes, USGS
Read a more detailed description of the main types of volcanoes. Text includes pictures for each example (but are all in black and white).