Cotton Thomas Basin, Utah - 7.5 Minute Series Topo Map PECO Magnifier and Middle to Lower Cambrian

and Middle to Lower Cambrian sedimentary rocks

from about 12

total-dissolved-solids concentration

and populous areas of the more distant central Wasatch Front

and eolian deposits are also present locally

Cotton Thomas Basin, Utah - 7.5 Minute Series Topo Map PECO Magnifier and Middle to Lower CambrianThe 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