Theodore Roosevelt National Park Nature and Science

About 60 million years ago, streams carried eroded materials eastward from the young Rocky Mountains and deposited them on a vast lowland -- today's Great Plains. During the warm, rainy periods that followed, dense vegetation grew, fell into swamp areas, and was later buried by new layers of sediments. Eventually this plant material turned into lignite coal. Some plantlife became petrified; today considerable amounts of petrified wood are exposed in the badlands. Bentonite, the blue-gray layer of clay , may be traced to ash from ancient volcanoes far to the west. But even as sediments were being deposited, streams were starting to cut down through the soft strata and to sculpt the infinite variety of buttes, tablelands, and valleys that made up the badlands we know today.

Though at first glance this landscape appears inhospitable and barren, it is home to a great variety of creatures and plants. Rainfall, scanty though it is, nourishes the grasses that cover the lands. And when the wildflowers bloom in bright profusion, they add their vibrant colors to the reds, browns, and greens of the earth and grasses. At home here, too, are over 180 species of birds, many of them songbirds. Both mule deer and white-tail deer inhabit the park. The white-tails prefer the river woodlands, and the mule deer like the more broken country and the uplands. Prairie dogs, historically a staple food source for many predators, live in "towns" in the grasslands. Through careful management some animals that nearly become extinct are once again living here. Bison and elk, for example, were reintroduced in 1956 and 1985 respectively.

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Featured Park
Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place.
Featured Wildlife
The pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. Being rock-gray in color, pikas are seldom seen until their shrill, metallic call reveals their presence.