Geology 103 (Sedimentology and Stratigraphy)

 

California State University, Sacramento

 

Week 14:

Carbonate shelf systems, Modern reefs

 

Objectives:

Upon completion of this unit students should be able to:

  • Describe the physical and oceanographic conditions that favor reef formation.
  • Discuss the five main types of carbonate shelves, and give examples of each: rimmed shelf, unrimmed platform, carbonate ramp, isolated platform, epeiric platform.
  • Identify the energy levels, facies, and rock or sediment types. that are present in the outer shelf, middle shelf and inner shelf of a carbonate shelf that is protected from wave action.
  • Be familiar with the formation and occurrence of a barrier reef, fringing reef, atoll, patch reef and deep water or cold water reef.
  • Discuss the difference between a framework reef, a bioherm and a carbonate buildup
  • .
  • Evaluate the physical factors that affect modern reefs
  • Comment on the future of carbonate reefs on planet Earth

    

Reading Assignments:

Lecture 23: Carbonate shelves, reef environments- Boggs, 5th edition, pp. 308-327

 

Video worksheet

 

Silent sentinels worksheet

 

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 23 notes

     

     

Graphics from lectures:

Lecture 23 graphics

     

Lab this week-

 

Petrography of carbonate rocks:

 

This week we will look at carbonate rocks in thin section.  I will pass out a copy of the lab.  If you need another copy you can click here:

 

Carbonate petrography p. 1

 

Carbonate petrography p. 2

 

Due date:  start of lab, next week.