Montoya Butte, New Mexico - 7.5 Minute Series Topo Map SH-4G sand dunes

sand dunes

while lighter shades highlight the higher altitudes

OFR-188 Lisbon Valley

the natural forces that shaped its landscapes

1977) geologic

Montoya Butte, New Mexico - 7.5 Minute Series Topo Map SH-4G sand dunesThe 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