Glacier National Park, MT (No. 2)
Glacier National Park's mountains began forming 170 million years ago when ancient rocks were forced eastward up and over much younger rock strata. Known as the Lewis Overthrust, these sedimentary rocks are considered to have some of the finest examples of early life fossils on Earth. The current shapes of the Lewis and Livingston mountain ranges and positioning and size of the lakes show the telltale evidence of massive glacial action, which carved U-shaped valleys and left behind moraines that impounded water, creating lakes. Of the estimated 150 glaciers over 25 acres (10 ha) in size which existed in the park in the mid-19th century during the late Little Ice Age, only 25 active glaciers remained by 2010. Scientists studying the glaciers in the park have estimated that all the active glaciers may disappear by 2030 if current climate patterns persist.
Glacier National Park still maintains almost all of its modern, original native plant and animal species (since discovery by Europeans). Large mammals such as American black bear, grizzly bear, bighorn sheep, elk, moose, mountain lion and mountain goats, as well as gray wolf, wolverine and Canadian lynx inhabit the park. Hundreds of species of birds, more than a dozen fish species, and quite a few reptiles and amphibian species have been documented. Species of butterflies, pollinating insects and other invertebrates range in the thousands.
Source: Wikipedia
