Teaching with the EarthChem Geochemical Database
Integrating Research and Education > EarthChem > Volcanic Fields > Part 2 - Compare and contrast the data

Part 2 - Compare and contrast the data

Using the data that you obtained in Part 1, answer the following questions.
  1. Which, if any, of the volcanic fields, has/have been active during the last 1 million years?
  2. Which, if any, of the volcanic fields represent(s) a protracted period of eruptive activity of longer than 50,000 years?
  3. Which, if any, of the volcanic fields represent(s) a single eruptive episode involving a single type of magma (basalt, andesite, rhyolite, etc.)? These fields would be termed "monogenetic".
  4. Which, if any, of the volcanic fields contain(s) more than one magma type–e.g., mafic (basaltic), intermediate (andesitic), and silicic (rhyolitic)?
  5. Which, if any, of the volcanic fields show(s) systematic trends of SiO2 or K2O with time? If so, what are the trends?

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