G145

Objectives:   Coast Range

 

1)  What is the general time frame for the formation of the coast range

 

2)  Know what a transgression and a regression is and what the deposits are that are associated with each

 

3)  How were the basalts that form the base of the coast range thought to have formed and been emplaced

 

4)  What are delta deposits and how are they emplaced?  What are turbidite deposits and how are they emplaced

 

5)  Understand how the basaltic peaks found in the Coast range formed

 

6)  What is meant by a reverse dike and give an example of one in the coast range

 

7)  Why is the Astoria formation important?

 

8)  What is the basic structure and rock types that make up the Olympic Mountains?

 

9)  Be able to discuss the topography left by the glaciation of the Puget sound region and how it formed.

 

10)  What is meant by the term stable dune?  Unstable dune?

 

11)  How do terraces form?

 

12)  Why does the northwest tend to have rocky coastlines instead of long sandy beaches?

 

13)  What is the evidence for large earthquakes occurring in the Northwest and why do we get them

 

Willamette Valley and the Puget Lowland

 

1)     Describe the geologic overview of the Willamette Valley and Puget Lowland.

 

2)     Describe the general Tertiary history of the Willamette Valley.

 

3)   Discuss the Pleistocene events that affected the Willamette Valley

 

4)   Provide the main structural features (faults, folds, etc.) and describe their implication on earthquake potential.

 

5)   Describe the causes (contributing factors) and kinds of geologic hazards associated with the northern Willamette Valley and southern Puget Lowland

 

6)  Formations to know:(stratigraphy and general composition)

         Willamette silt                                              Boring Lavas                                        Sandy River Mudstone

         Portland Hills Silt                                        Troutdale Gravel                                  CRBs

       

7)  Understand how the different formations in the valleys can tell us about the past history of the valleys. 

        i.e.   Transgressions and Regressions.  

                  What does the Scott’s Mills formation represent?

                 How can fossils tell us what climate use to be

 

8)  How did the Bretz floods affect the Willamette Valley?