Mercury's surface in "enhanced color," a color scheme created to emphasize color differences. This is not what Mercury would look like to the human eye, but by applying mathematical analysis to images, color differences can be accentuated beyond those visible to a person.
Mount Rushmore National Memorial under construction.
The workers had to endure conditions that varied from blazing hot to bitterly cold and windy. Each day they climbed 700 stairs to the top of the mountain to punch-in on the time clock. Then 3/8 inch thick steel cables lowered them over the front of the 500-foot face of the mountain in a "bosun chair." Despite the dangers, no one was killed during the project.
Otters in Glacier Bay National Park and Preserve, Alaska.
The sea otter population of Glacier Bay has increased dramatically in the past 20 years. Ecologists consider sea otters a keystone species here. Otters consume vast quantities of clams, urchins, crabs, and other invertebrates and their presence creates ripples through the ecosystem. NPS photo.
Every day someone like you becomes a wildland wildfire fighter, a teacher, a trail-builder, a museum curator, or a park ranger. Discover your opportunities in national parks. Come to play. Come to learn. Come to serve. Develop your environmental leadership skills. Find a job. Be the next generation to preserve and protect these great places.
With more than 80% of Americans living in urban areas, urban parks are more important than ever. The father of American landscape architecture, Frederick Law Olmsted, said of urban parks:
It is one great purpose of the Park to supply to the hundreds of thousands of tired workers, who have no opportunity to spend their summers in the country, a specimen of God's handiwork that shall be to them, inexpensively, what a month or two in the White Mountains or the Adirondacks is, at great cost, to those in easier circumstances.
AMERICA'S GREAT OUTDOORS: Secretary Salazar Designates Six New National Natural Landmarks
Office of the Secretary
WASHINGTON – Secretary of the Interior Ken Salazar today designated six new national natural landmarks in four western states that are home to unique natural treasures including hanging gardens, fossil footprints and rare Palouse prairie.
“One of the major goals of President Obama's America's Great Outdoors initiative is to develop a conservation ethic for the 21st Century,” Salazar said. “By designating these remarkable sites in Arizona, Colorado, Oregon, and Washington as national natural landmarks, we help establish and pass down to future generations those awe-inspiring places that make America truly beautiful.”
The new national natural landmarks are Barfoot Park, Golden Fossil Areas, Hanging Lake, Kahlotus Ridgetop, Round Top Butte, and The Island. Each site has been identified and evaluated through a rigorous process - including a scientific evaluation and public comment period - to formally acknowledge their outstanding and unique biological or geological features.
“This program not only encourages preservation of our nation's natural heritage but it also enhances our scientific understanding of these unique places,” said National Park Service Director Jonathan B. Jarvis. “Some of the landmarks are the best remaining examples of a type of feature in our nation – sometimes in the world – and we should continue to recognize and study these important natural features.”
There are 591 national natural landmarks with today's addition of:
Barfoot Park in the Chiricahua Mountains of southern Arizona supports an unusual mix of Sierra Madre and Rocky Mountain flora and fauna that includes four pine species and 18 other tree species. It also includes more than 15 acres of talus slopes, along with three meadows and two permanent springs. The landmark encompasses 680 acres of federal land managed by the U.S. Forest Service.
The 19-acre Golden Fossil Areas west and north of Golden, Colo., were designated as an extension to the existing Morrison Fossil Area National Natural Landmark, and will now be known as the Morrison-Golden Fossil Areas National Natural Landmark. The Golden Fossil Areas are among the most important paleontological sites in the Front Range and the western United States. They are known internationally as the only sites in the world to have produced a number of unique fossil footprints representing reptiles, birds, and mammals.
Hanging Lake National Natural Landmark is located along I-70, east of Glenwood Springs, Colo. The site is an outstanding example of a lake formed by travertine deposition. The lake and associated falls support a rare wetland ecosystem, including hanging gardens. The 72-acre site is situated within the White River National Forest.
Kahlotus Ridgetop National Natural Landmark is a remnant of the Palouse Prairie located about four miles north of Kahlotus, Wash. The Palouse Prairie is the most endangered and the most altered landscape in the inland Pacific Northwest. Approximately 1 percent of the original prairie remains and occurs in small fragments in developed landscapes. This 240-acre site is managed by the Washington Department of Natural Resources.
Round Top Butte National Natural Landmark includes a basaltic butte, flat volcanic plains and small hills near Medford, Ore. Its vegetation is a mix of dry grassland, ponderosa pine, white oak and buck brush. The habitats are exceptional because they are dominated by native bunchgrasses. The new landmark encompasses 747 acres in two parcels: an established Research Natural Area managed by the Bureau of Land Management, and a preserve managed by The Nature Conservancy.
The Island National Natural Landmark is located on an isolated plateau at the confluence of the Deschutes and Crooked rivers in east-central Oregon. This 208-acre site supports one of the best known and least disturbed examples of native juniper savanna located within the Columbia Plateau. The Island is also a designated Research Natural Area, and is jointly managed by the Bureau of Land Management and the U.S. Forest Service.
Administered by the National Park Service, the National Natural Landmarks Program http://www.nature.nps.gov/nnl/ was established in 1962. It is the only natural areas program of national scope to encourage the preservation of the best remaining examples of the nation's biological and geological features in both public and private ownership. The federal action of designation imposes no new land use restrictions that were not in effect before the designation.