Department of Earth Science |Northeastern Illinois University

INTRODUCTION TO EARTH SCIENCE
ESCI 121
Section 06
Fall 2008

Daily Objectives #9 (September 23, 2008)

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

Common Sedimentary Rock-Forming Minerals

w Examine and describe the properties of each mineral sample in the following groups, and determine what each group has in common.  Finally, assign a name to each mineral using a mineral key.

                First Group:                                 #   7, 17, 19, 20, 40, 43
                Second Group:                           #   2, 18, 30, 46
                Third Group (if you have time): # 14, 33, 34, 44

Sedimentary Rocks

w Describe each of the steps in forming sediments: weathering, transport, and deposition.

w Describe the process that changes sediments into rock (lithification), including compaction and cementation.

w Tell what weathering is, and explain the difference between chemical and mechanical (physical) weathering. 

w List the four main processes that transport sediment.

w Describe what chemical sediments are and how they form, using the terms dissolution and precipitation.

w List three main groups of detrital (clastic) sediments, and tell how they are different based on their size.

w Using the list of common sedimentary rock-forming minerals that appears above (you should have assigned names to each of the numbered specimens listed above), tell how each is likely to play a part in forming a sedimentary rock.