Bear Canyon, Utah - 7.5 Minute Series Topo Map economic geology and indoor-radon hazards

and indoor-radon hazards

Reclamation of abandoned coal mines in the Uinta Basin

Scale: 1:31

With facts and anecdotes drawn from camp newspapers

Pages: 808 p

Bear Canyon, Utah - 7.5 Minute Series Topo Map economic geology and indoor-radon hazardsThe 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