Search results for Pres

1 -2- 3 4 5
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
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  
Broken Hill with the Pacific Ocean in the distance. Broken Hill is an ancient, compacted sand dune that was uplifted to its present location and is now eroding, Torrey Pines State Reserve, San Diego, California
Broken Hill with the Pacific Ocean in the distance. Broken Hill is an ancient, compacted sand dune that was uplifted to its present location and is now eroding.
Location: Torrey Pines State Reserve, San Diego, California
Image ID: 14758  
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 10368  
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 10369  
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 10375  
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 10378  
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 10383  
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 10391  
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
Detail within the Mandelbrot set fractal. This detail is found by zooming in on the overall Mandelbrot set image, finding edges and buds with interesting features. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 10395  
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 18729  
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 18731  
Fractal design. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
Fractal design. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 18732  
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 18737  
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set, Mandelbrot set
The Mandelbrot Fractal. Fractals are complex geometric shapes that exhibit repeating patterns typified by self-similarity, or the tendency for the details of a shape to appear similar to the shape itself. Often these shapes resemble patterns occurring naturally in the physical world, such as spiraling leaves, seemingly random coastlines, erosion and liquid waves. Fractals are generated through surprisingly simple underlying mathematical expressions, producing subtle and surprising patterns. The basic iterative expression for the Mandelbrot set is z = z-squared + c, operating in the complex (real, imaginary) number set.
Species: Mandelbrot fractal, Mandelbrot set
Image ID: 18739  
Clouds Rest viewed from Olmsted Point. Clouds Rest is one of the most massive -- if not the singlemost massive -- granite monoliths in the world. A vast lobe of Mesozoic-era granodiorite magma cooled to rock and was gradually uplifted to its present altitude of 9926 ft. Later, glaciers cut it into its present shape, Yosemite National Park, California
Clouds Rest viewed from Olmsted Point. Clouds Rest is one of the most massive -- if not the singlemost massive -- granite monoliths in the world. A vast lobe of Mesozoic-era granodiorite magma cooled to rock and was gradually uplifted to its present altitude of 9926 ft. Later, glaciers cut it into its present shape.
Location: Yosemite National Park, California
Image ID: 09965  
Glacial erratics atop Olmsted Point. Erratics are huge boulders left behind by the passing of glaciers which carved the granite surroundings into their present-day form, Yosemite National Park, California
Glacial erratics atop Olmsted Point. Erratics are huge boulders left behind by the passing of glaciers which carved the granite surroundings into their present-day form.
Location: Yosemite National Park, California
Image ID: 09966  
The Great Wall, Navajo Tribal Lands, Arizona. Sandstone "fins", eroded striations that depict how sandstone -- ancient compressed sand -- was laid down in layers over time. Now exposed, the layer erode at different rates, forming delicate "fins" that stretch for long distances, Page
The Great Wall, Navajo Tribal Lands, Arizona. Sandstone "fins", eroded striations that depict how sandstone -- ancient compressed sand -- was laid down in layers over time. Now exposed, the layer erode at different rates, forming delicate "fins" that stretch for long distances.
Location: Navajo Tribal Lands, Page, Arizona
Image ID: 26644  
Heermanns gull, presunrise purple-pink glow in the distant sky, Larus heermanni, La Jolla, California
Heermanns gull, presunrise purple-pink glow in the distant sky.
Species: Heermann's gull, Larus heermanni
Location: La Jolla, California
Image ID: 23656  
Ferns grow below coastal redwood and Douglas Fir trees, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements, Sequoia sempervirens
Ferns grow below coastal redwood and Douglas Fir trees, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements.
Species: California redwood, Coast redwood, Giant redwood, Sequoia sempervirens
Location: Redwood National Park, California
Image ID: 25796  
Ferns grow below coastal redwood and Douglas Fir trees, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements, Sequoia sempervirens
Ferns grow below coastal redwood and Douglas Fir trees, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements.
Species: California redwood, Coast redwood, Giant redwood, Sequoia sempervirens
Location: Redwood National Park, California
Image ID: 25798  
Giant redwood, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements, Sequoia sempervirens
Giant redwood, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements.
Species: California redwood, Coast redwood, Giant redwood, Sequoia sempervirens
Location: Redwood National Park, California
Image ID: 25799  
Commemoration plaque in Lady Bird Johnson Grove, marking the place where President Richard Nixon dedicated this coastal redwood grove to Lady Bird Johnson, an environmental activist and former first lady, Sequoia sempervirens, Redwood National Park, California
Commemoration plaque in Lady Bird Johnson Grove, marking the place where President Richard Nixon dedicated this coastal redwood grove to Lady Bird Johnson, an environmental activist and former first lady.
Species: California redwood, Coast redwood, Giant redwood, Sequoia sempervirens
Location: Redwood National Park, California
Image ID: 25808  
Broken Hill is an ancient, compacted sand dune that was uplifted to its present location and is now eroding, Torrey Pines State Reserve, San Diego, California
Broken Hill is an ancient, compacted sand dune that was uplifted to its present location and is now eroding.
Location: Torrey Pines State Reserve, San Diego, California
Image ID: 18930  
The Chateau at Oregon Caves National Monument. Considered one of the National Park System's classic Great Lodges, and a National Historic Landmark, the Chateau was completed in 1934. The Chateau is a six-story structure with a reinforced concrete foundation and a superstructure of wood frame construction with enormous post and beam interior supports. The building spans a small gorge and a great deal of the building's mass is banked into that depression. Exterior walls are shiplap siding sheathed with cedar bark, giving the building a shaggy, rustic appearance
The Chateau at Oregon Caves National Monument. Considered one of the National Park System's classic Great Lodges, and a National Historic Landmark, the Chateau was completed in 1934. The Chateau is a six-story structure with a reinforced concrete foundation and a superstructure of wood frame construction with enormous post and beam interior supports. The building spans a small gorge and a great deal of the building's mass is banked into that depression. Exterior walls are shiplap siding sheathed with cedar bark, giving the building a shaggy, rustic appearance.
Location: Oregon Caves National Monument
Image ID: 25860  
Ocotillo Express Wind Energy Projects, moving turbines lit by the rising sun,
Ocotillo Express Wind Energy Projects, moving turbines lit by the rising sun,.
Location: Ocotillo, California
Image ID: 30248  
Broken Hill with the Pacific Ocean in the distance. Broken Hill is an ancient, compacted sand dune that was uplifted to its present location and is now eroding, Torrey Pines State Reserve, San Diego, California
Broken Hill with the Pacific Ocean in the distance. Broken Hill is an ancient, compacted sand dune that was uplifted to its present location and is now eroding.
Location: Torrey Pines State Reserve, San Diego, California
Image ID: 28342  
Devil's Postpile, a spectacular example of columnar basalt. Once molten and under great pressure underground, the lava that makes up Devil's Postpile cooled evenly and slowly, contracting and fracturing into polygonal-sided columns. The age of the formation is estimated between 100 and 700 thousand years old. Sometime after the basalt columns formed, a glacier passed over the formation, cutting and polishing the tops of the columns. The columns have from three to seven sides, varying because of differences in how quickly portions of the lava cooled, Devils Postpile National Monument, California
Devil's Postpile, a spectacular example of columnar basalt. Once molten and under great pressure underground, the lava that makes up Devil's Postpile cooled evenly and slowly, contracting and fracturing into polygonal-sided columns. The age of the formation is estimated between 100 and 700 thousand years old. Sometime after the basalt columns formed, a glacier passed over the formation, cutting and polishing the tops of the columns. The columns have from three to seven sides, varying because of differences in how quickly portions of the lava cooled.
Location: Devils Postpile National Monument, California
Image ID: 23266  
Devil's Postpile, a spectacular example of columnar basalt. Once molten and under great pressure underground, the lava that makes up Devil's Postpile cooled evenly and slowly, contracting and fracturing into polygonal-sided columns. The age of the formation is estimated between 100 and 700 thousand years old. Sometime after the basalt columns formed, a glacier passed over the formation, cutting and polishing the tops of the columns. The columns have from three to seven sides, varying because of differences in how quickly portions of the lava cooled, Devils Postpile National Monument, California
Devil's Postpile, a spectacular example of columnar basalt. Once molten and under great pressure underground, the lava that makes up Devil's Postpile cooled evenly and slowly, contracting and fracturing into polygonal-sided columns. The age of the formation is estimated between 100 and 700 thousand years old. Sometime after the basalt columns formed, a glacier passed over the formation, cutting and polishing the tops of the columns. The columns have from three to seven sides, varying because of differences in how quickly portions of the lava cooled.
Location: Devils Postpile National Monument, California
Image ID: 23267  
Devil's Postpile, a spectacular example of columnar basalt. Once molten and under great pressure underground, the lava that makes up Devil's Postpile cooled evenly and slowly, contracting and fracturing into polygonal-sided columns. The age of the formation is estimated between 100 and 700 thousand years old. Sometime after the basalt columns formed, a glacier passed over the formation, cutting and polishing the tops of the columns. The columns have from three to seven sides, varying because of differences in how quickly portions of the lava cooled, Devils Postpile National Monument, California
Devil's Postpile, a spectacular example of columnar basalt. Once molten and under great pressure underground, the lava that makes up Devil's Postpile cooled evenly and slowly, contracting and fracturing into polygonal-sided columns. The age of the formation is estimated between 100 and 700 thousand years old. Sometime after the basalt columns formed, a glacier passed over the formation, cutting and polishing the tops of the columns. The columns have from three to seven sides, varying because of differences in how quickly portions of the lava cooled.
Location: Devils Postpile National Monument, California
Image ID: 23285  
Cloud's Rest at sunset, viewed from Olmsted Point. Clouds Rest is one of the most massive -- if not the singlemost massive -- granite monoliths in the world. A vast lobe of Mesozoic-era granodiorite magma cooled to rock and was gradually uplifted to its present altitude of 9926 ft. Later, glaciers cut it into its present shape, Yosemite National Park, California
Cloud's Rest at sunset, viewed from Olmsted Point. Clouds Rest is one of the most massive -- if not the singlemost massive -- granite monoliths in the world. A vast lobe of Mesozoic-era granodiorite magma cooled to rock and was gradually uplifted to its present altitude of 9926 ft. Later, glaciers cut it into its present shape.
Location: Yosemite National Park, California
Image ID: 25761  
1 -2- 3 4 5
Permalink: Pres photos

All photographs copyright © Phillip Colla / Oceanlight.com, all rights reserved worldwide.