Page 163 - Laboratory Manual in Physical Geology
P. 163
A CTIVIT Y 5.2 Minerals That Form Igneous Rocks
Name: ______________________________________ Course/Section: ______________________ Date: ___________
A. Using the Minerals Database (pages 93 – 97 ), look up each mineral name listed below and identfify its picture below. Below
each picture, write the name of the mineral , its chemical composition (chemical formula or chemical name), and words that
describe it in a way that you will be able to recognize it. (All samples below are shown at their actual size, x1.)
Augite (pyroxene) Biotite mica Hornblende (amphibole) Muscovite mica
Olivine Plagioclase feldspar Potassium feldspar Quartz
1 2 3
4 5 6
7 8
B. REFLECT & DISCUSS Which specific minerals are mafic and which ones are felsic? Why?
144
