Boulder City, Nevada - 30x60 Minute USGS Topographic Map Geochronology Archeology and Steamboating

Archeology and Steamboating

The plateau is capped by remnants of the 20-million-year-old Markagunt Megabreccia

Hiking the Sierra Nevada features 104 of the finest trails in this magnificent mountain range - from short day hikes to overnight adventures

Eoloian sand dunes

Boulder City, Nevada - 30x60 Minute USGS Topographic Map Geochronology Archeology and SteamboatingThe 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