Yellowhorse Flat, Arizona - 7.5 Minute Series Topo Map National Recreation Area the city's architecture suddenly diversified

the city's architecture suddenly diversified in scale

It tells a story that should not be forgotten

its mystique seems to continue to grow after more than 150 years

but most land subsidence in the United States is associated with aquifer compaction caused pressure decline associated with groundwater withdrawal

E Langenheim

Yellowhorse Flat, Arizona - 7.5 Minute Series Topo Map National Recreation Area the city's architecture suddenly diversifiedThe 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