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geo directory

Some of these questions must be answered by consulting your textbook which correlates with the video series.  Consult: "Physical Geology -Earth Revealed" by Carlson, Plummer and McGeary; published by McGraw Hill, New York City, NY


 Episode 8. Earth's Structures 
A visit to the Grand Canyon lays the foundation for this exploration of rock layers and deformation. The program covers sedimentation, major structures, the methods used to examine them, and how petroleum may be trapped inside them. It also looks at tectonic force and the different types of stress involved in the formation of geologic structures. 

Episode 8: Earth's Structures

What are the forces which shape the earth's landscape?


Discuss the development of sedimentary layering.


How is the principal of "original horizontality" used to decipher earth history?


What is an outcrop?


What is a geologic cross-section?


What are the 3 main categories of geologic structures?


What causes rocks to fold?


Describe anticlines and synclines.


Do folds form in a convergent or divergent boundary zone?


What causes rocks to fracture instead of fold?


Describe a strike-slip fault.


Describe normal, reverse, and thrust faults.


Discuss compressional and tensional stresses.


What is the difference between plastic strain and elastic strain?


What happens if the elastic limit is exceeded?


What is an unconformity and how do they form?


What is a nonconformity,? Why do they represent the greatest lapse in time?


Why is folding especially important to economic geology?


How are gas, oil, and water trapped by earth structures?


How does the study of structural geology relate to our modern society?


link to the answers   (this will not be an active link until after the assignment due date!)