Geology 103 (Sedimentology and Stratigraphy)
California State University, Sacramento
Week 14: Carbonate components, Folk and Dunham's carbonate classification systems, Carbonate stability |
Objectives:
Upon completion of this unit students should be able to:
Name and discuss the components of carbonate rocks (grains, cement, micrite)
Discuss the major types of carbonate grains and their sources
Distinguish between micrite, sparry calcite cement, and grains in hand specimens of carbonate rocks
Understand the importance of cement in marine environments
Describe the major components in Folk's carbonate classification system
Describe the major components in Dunham's carbonate classification system
Identify carbonate rocks in hand specimen, and classify them using Folk and Dunham's classification systems
Discuss the chemical, physical and biological factors that affect the stability and preservation of carbonate material in the world's oceans.
Describe the Carbonate Compensation Depth (CCD), and factors that lead to variability in the depth of the CCD.
Describe the different morphologies of algal carbonates
Distinguish between limestone and dolostone in hand specimen
Identify different types of carbonate porosity in hand specimen
Discuss the chemical and physical factors that affect the stability and preservation of carbonate material in the world's oceans.
Reading Assignments:
Lecture 19: Carbonate classification- Boggs, 5th edition, pp. 135-147
Lecture 20: Carbonate stability- Boggs, 5th edition, pp. 147-154
Please
fill out a reading log for this week. Reading logs are due at the start of class on Wednesday.
Class notes:
Graphics from lectures:
Lab this week-
Petrology and porosity of carbonate rocks:
I will pass out a copy of the lab. If you need another copy you can click here:
Carbonate classification and porosity
Due date: Finish the lab today, then check your answers with the key. I will post a key in the front of the classroom.
You will take a short exit quiz before you leave lab today. This will test your knowledge of carbonate rock I.D.