170 million years ago, ancient sedimentary rocks were forced eastward over younger formations in this area. The older rocks, called the Lewis Overthrust, contain excellent examples of Earth’s earliest life forms. Glaciers then carved the landscape into it’s current form, leaving U-shaped valleys, cirques (amphitheatre-shaped upper valleys), cols (passes), arêtes (knife ridges), and gendarmes (pinnacles). Moraines formed at the ends of receding glaciers created over 700 lakes and tarns, most unnamed. Due to climate patterns, most of the glaciers present 150 years ago have disappeared, with the rest potentially melting by 2020. This image covers both Glacier National Park, and Waterton Lakes National Park across the border in Canada.
Maps-al-Fresco™ harken back to the days in cartography when plaster relief models were made, often for the purpose of wall or museum display, or to be photographed for a printed relief map background. Plain in appearance, they show the landscape in it’s simplest, greyscale form.
These posters are available on high-quality media (various papers and canvas) using archival inks, and print clearly up to about 34” x 23” (“Large” size). Fulfilled by Zazzle.com. There is a framing option on their website.
Park information: http://www.nps.gov/glac/index.htm