Hood River, Oregon - 30x60 Minute Series Topo Map Wetlands strange events

strange events

By: Paul Opler & Amy Wright

The heat source for the geothermal system is probably related to

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Rich County

Hood River, Oregon - 30x60 Minute Series Topo Map Wetlands strange eventsThe distinctive characteristic of a topographic map is that the shape of the Earth's surface is shown by contour lines. Contours are imaginary lines that join points of equal elevation on the surface of the land above or below a reference surface, such as mean sea level. Contours make it possible to measure the height of mountains, depths of the ocean bottom, and steepness of slopes. A topographic map shows more than contours. The map also includes