Corvallis, Oregon - 30x60 Minute Series Topo Map 62502 and 50k Geologic Maps strange events

strange events

It tells a story that should not be forgotten

" according to its author - pays tribute to the soil

The prevalence of these Cenozoic volcanic and sedimentary units strongly indicates the profound crustal stretching and thinning that characterized the Basin and Range extension in the western United States

Corvallis, Oregon - 30x60 Minute Series Topo Map 62502 and 50k Geologic Maps strange eventsThe 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