Green River, Utah - 7.5 Minute Series Topo Map Elk PRELUDE TO SEVEN SLOTS: FILLING

PRELUDE TO SEVEN SLOTS: FILLING AND SUBSEQUENT MODIFICATION OF SEVEN BROAD CANYONS IN THE NAVAJO SANDSTONE

Washington County

Water on Earth was brought here by meteorites

Tooele County

with emphasis on determining the thickness of the valley-fill aquifer and the water-yielding properties of the fractured-rock aquifers

Green River, Utah - 7.5 Minute Series Topo Map Elk PRELUDE TO SEVEN SLOTS: FILLINGThe 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