Science in Grand Teton National Park

Located in northwestern Wyoming, Grand Teton National Park and the John D. Rockefeller, Jr. Memorial Parkway have a combined area of 333,700 acres within the Greater Yellowstone Ecosystem, which encompasses more than 13 million acres and is considered one of the few remaining, nearly intact, temperate ecosystems on Earth. The park ranges in elevation from 6,400 feet on the sagebrush-dominated valley floor to 13,770 feet on the windswept granite summit of the Grand Teton. Geologists regard the Teton Range as one of Earth’s most impressive examples of fault-block mountains. The blocks forming the Tetons and Jackson Hole are joined at the Teton Fault, along which movement is estimated to average about one foot per 300–400 years. Although the Tetons are the youngest mountains of the Rocky Mountain chain, they contain some of its oldest rocks, dating back about 2.8 million years. Piedmont lakes rimmed by moraines from the last glaciation are adjacent to the range.