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Article: Mapping our changing earth.
- Article from:
- Faces: People, Places, and Cultures
- Article date:
- November 1, 2005
- Author:
CopyrightCOPYRIGHT 2005 Carus Publishing Co. 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)
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The thin crust of the earth that we live on is much like the shell of an egg. This shell is about 20 miles thick and is constantly changing, just as the countries and people on this surface also change. Maps that show accurate and up-to-date physical and political changes are helpful to governments and individuals.
"Earth's movement shows in the rocks. Ancient rivers and oceans are evidenced in sedimentary rock formations. These formations may be hundreds of miles from present-day ocean shores. Rock formations and topographic maps show how the earth's crust has moved over time," says professional geologist and environmental hydrogeologist Julie Brooks Hiller.
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