Geology 103 (Sedimentology and Stratigraphy)

 

California State University, Sacramento

 

Week 13:

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, matrix (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 and physical 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.

  • Describe the Carbonate Compensation Depth (CCD), and factors that lead to variability in the depth of the CCD.

    

Reading Assignments:

Lecture 21: Carbonate classification- Boggs, 5th edition, pp. 135-147

 

Lecture 22: 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.

 

Reading log

     

Class notes:

Lecture 21 notes

Lecture 22 notes

     

Graphics from lectures:

Lecture 21 graphics

Lecture 22 graphics

   

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 rocks

 

Due date:  start of lab, next week.