Casino Lakes, Idaho - 7.5 Minute Series Topo Map OHV Maps We also mapped lithologic contacts

We also mapped lithologic contacts in the northwest portion of the study area and tabulated landslide and pertinent lithologic and hydrologic data obtained through field observations

that tell the story of the railroad and of the people who kept it running

The first section of the book introduces the major geological time periods - the record of mountain building events from the oldest to the youngest

providing an intuitive grasp of the terrain

The Utah part of the national map was taken from the digital Quaternary tectonics map of Hecker

Casino Lakes, Idaho - 7.5 Minute Series Topo Map OHV Maps We also mapped lithologic contactsThe 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