Castle Rock, Idaho - 7.5 Minute Series Topo Map Outdoor Activities WRB-2 Ground-water conditions in the

WRB-2 Ground-water conditions in the southern and central parts of the East Shore area 1953-1961

depth to water and water-level change over time

Location: Box Elder County and Weber County

grabens above salt walls

Castle Rock, Idaho - 7.5 Minute Series Topo Map Outdoor Activities WRB-2 Ground-water conditions in theThe 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