EESA09H3 Chapter 11: EESA06 Chapter 11.doc

48 views4 pages
23 Apr 2012
School
Course
Professor

Document Summary

Structural geology: branch of geology concerned with the shapes, arrangemnet, and interrelationships of bedrock units and forces that cause them. Tectonic forces move and deform parts of the lithosphere, particularly along plate mar- gins. Stress: a force per unit area (can only observe stress of rock bodies that are exposed, difficult for buried rocks) Strain: change in size (volume) or shape, or both, in response to stress. Compressive stress common along convergent plate boundaries and result in rocks being defromed by a shortening strain (changes in perpendicular direction to applied stress) Tensional stress: caused by forces pulling away from one another in opposite direc- tions, results in stretching or extension of material (changes in parellel direction to ap- plied stress) Tensional stress occurs at divergent plate boundaries (since rocks are very weak when pulled apart, fractures and faults are common)

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents

Related Questions