Department of Earth Science |Northeastern Illinois University

INTRODUCTION TO EARTH SCIENCE
ESCI 121
Section 06
Fall 2009

Daily Objectives #17  (October 29, 2009)                                                                                                         Dr. Sanders

The homework assignment on Earthquake Maps is due on Tuesday next week.  By the time you leave class today, you should be prepared to complete it!

By the end of today's class, you should be able to do the following:


VOLCANOES

w  (Review) List the geotectonic settings in which volcanoes occur (subduction zones, divergent zones, hotspots).

w  (Review) Explain what a hotspot is, and tell how it fits into a geotectonic framework.  Give an example.

w  Describe the differences between lava of mafic and felsic composition, and tell how these differences lead to variation in these aspects:

        q form/shape/profile of the volcano
        q type of material erupted, and
        q the volcano's "eruptive style".

w  Define the terms pahoehoe and aa, and tell where these materials might be found.

w  After viewing the Raging Planet film "Volcano", describe some of the strategies people use to cope with life next to a volcano.