Chaco Can, New Mexico - 30x60 Minute USGS Topographic Map SH-5D When the fur trade declined

When the fur trade declined

Generally unmetamorphosed Ordovician to Permian carbonate strata lie above the fault

Yellowstone Lake

5-by-11-inch paper

Chaco Can, New Mexico - 30x60 Minute USGS Topographic Map SH-5D When the fur trade declinedThe 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