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A Tapestry of Time and Terrain:
The Union of Two Maps - Geology and Topography
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Small State boundaries map
State Boundaries
Small Physiographic regions map
Physiographic Regions
A map is a way of displaying geographical information. Boundaries help us to break large areas into smaller regions. Think about different ways of defining boundaries. Political boundaries- borders of countries, states, cities- are just one way of referring to specific areas. Earth scientists have defined their own boundaries, called physiographic regions, based upon geology and topography. How might a biologist define boundaries? What about a sociologist? An ecologist? How would you define boundaries?
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U.S. Department of the Interior
U.S. Geological Survey
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Last Modification: March 25, 2002 (keb)
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