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?