Objectives

Upon completion of this unit students should be able to: Discuss how temperature and silica content affect lava Define the terms lava, viscosity, magma, vesicular, frothy, fragmental Be familiar with textural terms for extrusive rocks:  glassy, finely crystalline, groundmass, porphyritic, obsidian Discuss the chemical composition of basalt, andesite and rhyolite Differentiate between the main types of volcanoes:  cinder cones, composite cones (stratovolcanoes), shield volcanoes, volcanic domes

Homework for week #4

Complete the on-line multiple choice quiz for Chapter four (Volcanoes). E-mail it to me at: geology10quiz@gmail.com Please note:  This is different from my CSUS e-mail address!   You can find the quiz by following this link: http://mhhe.com/plummer11e Click on the “Resources” tab at the top of the page, and scroll down to the chapter that you want to work on.  Complete the multiple choice quiz on-line, and e-mail the results to me. Due date for homework:  The start of class on Friday, Sept. 23

Reading Assignments

From Plummer, Carlson and Hammersley, Physical Geology, 13th edition Chapter 4- Volcanoes and extrusive igneous rocks

 

Powerpoint graphics used during lectures

Week 4 graphics