F2 Review Questions
  1. Compare mafic and felsic lava by completing the following table:

      Mafic Lava Felsic Lava
         
    Viscosity (high / low) low high
    Composition magnesium / iron silica
    Gas content (high / low) low high
    Example(s) of rock type basalt /gabbro granite

  2. Click on each of these volcano locations. Carefully examine each volcano. Determine the type of volcano by inspection.

    Volcano Location Type of Volcano Illustrated
       
    Glacier Peak, Washington composite (stratovolcano)
    Mauna Kea, Hawaii shield
    Amboy Crater, California cinder cone
    Mt. Okmok, Alaska shield
    Lava Butte, Oregon cinder cone
    Mt. Adams, Washington composite (stratovolcano)

  3. Please match each term from column A with the most appropriate item from column B.

    Number COLUMN A COLUMN B
         
    4 caldera 1) harder solidified vent of a volcano
    3 batholith 2) is parallel to rock layers
    7 dike 3) a large solidified magma chamber
    1 volcanic neck 4) large depression at top of volcano
    2 sill 5) small magma chamber with bulging rock on top
    5 laccolith 6) formed as magma slowly cools
    6 basalt column 7) cuts across rock layers

  4. How does the eruption of a supervolcano differ from “regular” volcanic eruptions?

    Supervolcanoes differ from regular volcanoes because of the size and scale of their eruptions. A supervolcano is defined as a volcanic event that discharges more than 1,000 cubic kilometers (240 cubic miles) of material during its eruption.