Geology 103 (Sedimentology and Stratigraphy)

California State University, Sacramento

Week 2: Classification of clastic sediments, fluid flow


Upon completion of this unit students should be able to:

  • Classify clastic sediments and sedimentary rocks based on grain size
  • Discuss fluid density, fluid viscosity and their effects on grain transport
  • Distinguish between dynamic viscosity and kinematic viscosity
  • Define laminar and turbulent flow using the Reynolds equation
  • Explain particle entrainment, including relevant forces that act on a particle
  • Use the Hjulstrom curve to distinguish between erosion and deposition for particular grain sizes
  • Give a conceptual explanation of Stoke's law

Reading Assignments:

Lecture 2: Classification of siliciclastic sedimentary rocks- Boggs, 5th edition, pp. 101-123

Lecture 3: Fundamentals of fluid flow- Boggs, 5th edition, pp. 19-31

The second reading assignment is for week 2, and will be due Wednesday February 6.

Reading log


Class notes:

Lecture 2 notes

Lecture 3 notes


Graphics from lectures:

Lecture 2 graphics

Lecture 3 graphics

Lab week 2:

In lab this week we will look at grain size in clastic sedimentary rocks.  I will split the lab into two groups, and you will take turns running the rotap sieve shaker and making a grain size key.


Lab solution:

Click here for the lab solution:

Week 2 lab key