|
|
Article: New data resolve stressful problem. (stress measurements of North American continental crust)
- Article from:
- Science News
- Article date:
- December 21, 1985
CopyrightCOPYRIGHT 1985 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Five years ago, when Mary Lou Zoback of the U.S. Geological Survey in Menlo Park, Calif., and Mark D. Zoback of Stanford University compiled stress measurements of the North American continental crust, they were left with a perlexing problem: Compressive stresses along the Eastern Seaboard ran in a northwest direction, while stresses in hte rest of the continent, out to the Rocky Mountains, were oriented toward the northeast (SN: 6/14/80, p. 372). Moreover, both of the two main theories explaining why the continent is stressed predicted ...