Elephant Butte, Utah - 7.5 Minute Series Topo Map Trail Riding This first all-photographic field guide

This first all-photographic field guide to fossils features 474 full-color identification pictures of fossilized sponges

Elevations of major peaks are expressed in feet and depth soundings are expressed in fathoms

from the copper kings of Butte to the Freemen of Garfield County

land-based and aerial photomosaics which cover about 80 miles (160 km) of the Upper Cretaceous Ferron Sandstone outcrop belt in east-central Utah

revealing regional patterns of gas shows in the Mancos and Hermosa

Elephant Butte, Utah - 7.5 Minute Series Topo Map Trail Riding This first all-photographic field guideThe 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