Navajo sandstone forms the cliffs and walls of Zion National Park. The sandstone reaches a thickness of 2300 feet and consists of ancient cemented desert sand dunes. Horizontal lines, commonly called crossbedding, represent layers of wind-blown sand that built up into sand dunes. These dunes were then buried, and the sand grains glued together by calcite and iron oxide to form sandstone.
Location: Zion National Park, Utah
Image ID: 12519
Sol Duc Falls. Sol Duc Falls is one of the largest and most beautiful waterfalls in Olympic National Park, seen here from a bridge that crosses the canyon just below the falls. Surrounding the falls is an old-growth forest of hemlocks and douglas firs, some of which are three hundred years in age.
Location: Sol Duc Springs, Olympic National Park, Washington
Image ID: 13748
San Diego downtown waterfront skyline, viewed across San Diego Bay from Coronado Island.
Location: San Diego, California
Image ID: 14619
San Diego downtown waterfront skyline, viewed across San Diego Bay from Coronado Island.
Location: San Diego, California
Image ID: 14620
Epaulette shark. The epaulette shark is primarily nocturnal, hunting for crabs, worms and invertebrates by crawling across the bottom on its overlarge fins.
Species: Epaulette shark, Hemiscyllium ocellatum
Image ID: 14958
Cross fox, Sierra Nevada foothills, Mariposa, California. The cross fox is a color variation of the red fox.
Species: Red fox, Vulpes vulpes
Image ID: 15958
Cross fox, Sierra Nevada foothills, Mariposa, California. The cross fox is a color variation of the red fox.
Species: Red fox, Vulpes vulpes
Image ID: 15959
Cross fox, Sierra Nevada foothills, Mariposa, California. The cross fox is a color variation of the red fox.
Species: Red fox, Vulpes vulpes
Image ID: 15961
Cross fox, Sierra Nevada foothills, Mariposa, California. The cross fox is a color variation of the red fox.
Species: Red fox, Vulpes vulpes
Image ID: 15962
A large, old brown bear (grizzly bear) wades across Brooks River. Coastal and near-coastal brown bears in Alaska can live to 25 years of age, weigh up to 1400 lbs and stand over 9 feet tall.
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska
Image ID: 17038
Cross fox, Sierra Nevada foothills, Mariposa, California. The cross fox is a color variation of the red fox.
Species: Red fox, Vulpes vulpes
Image ID: 15955
Sunrise over The Mount Soledad Cross, a landmark in La Jolla, California. The Mount Soledad Cross is a 29-foot-tall cross erected in 1954. Aerial photo.
Location: La Jolla, California
Image ID: 38125
Sunrise on the Racetrack Playa. The sliding rocks, or sailing stones, move across the mud flats of the Racetrack Playa, leaving trails behind in the mud. The explanation for their movement is not known with certainty, but many believe wind pushes the rocks over wet and perhaps icy mud in winter.
Location: Racetrack Playa, Death Valley National Park, California
Image ID: 27701
A sliding rock of the Racetrack Playa. The sliding rocks, or sailing stones, move across the mud flats of the Racetrack Playa, leaving trails behind in the mud. The explanation for their movement is not known with certainty, but many believe wind pushes the rocks over wet and perhaps icy mud in winter.
Location: Racetrack Playa, Death Valley National Park, California
Image ID: 25243
Racetrack sailing stone and star trails. A sliding rock of the Racetrack Playa. The sliding rocks, or sailing stones, move across the mud flats of the Racetrack Playa, leaving trails behind in the mud. The explanation for their movement is not known with certainty, but many believe wind pushes the rocks over wet and perhaps icy mud in winter.
Location: Racetrack Playa, Death Valley National Park, California
Image ID: 27668
Eiffel Tower rises over the Trocadero place. The Trocadero, site of the Palais de Chaillot, is an area of Paris, France, in the 16th arrondissement, across the Seine from the Eiffel Tower.
Location: Trocadero, Paris, France
Image ID: 28168
The Mount Soledad Cross, a landmark in La Jolla, California. The Mount Soledad Cross is a 29-foot-tall cross erected in 1954.
Location: La Jolla, California
Image ID: 26548
Les cypres a Cagnes by Henri Edmond Cross, Musee d'Orsay, Paris.
Location: Musee dOrsay, Paris, France
Image ID: 35618
Trocadero. The Trocadero, site of the Palais de Chaillot, is an area of Paris, France, in the 16th arrondissement, across the Seine from the Eiffel Tower.
Location: Trocadero, Paris, France
Image ID: 35642