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Copyrights: All pictures were taken by amateur photographer Bruce Guthrie (me!) who retains copyright on them. Free for non-commercial use with attribution. See the [Creative Commons] definition of what this means. "Photos (c) Bruce Guthrie" is fine for attribution. (Commercial use folks including AI scrapers can of course contact me.) Feel free to use in publications and pages with attribution but you don't have permission to sell the photos themselves. A free copy of any printed publication using any photographs is requested. Descriptive text, if any, is from a mixture of sources, quite frequently from signs at the location or from official web sites; copyrights, if any, are retained by their original owners.
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ARCH_160716_013.JPG: Long line to get in
ARCH_160716_060.JPG: Moab Fault:
A dramatic break in the earth's surface occurred here about six million years ago. Under intense pressure, unable to stretch, the crust cracked and shifted. Today, the highway parallels this fracture line, called the Moab Fault.
After the rock layers shifted, the east wall of the canyon where you are standing ended up more than 2,600 feet lower than the west side (across the highway).
ARCH_160716_076.JPG: Rock climber hooks
ARCH_160716_132.JPG: Landmarks on the Landscape
The clean, clear air of this region often permits high visibility. The La Sal Mountains are about 20 miles (32 km) away, and rise to over 12,000 feet (3640 meters) in elevation.
ARCH_160716_142.JPG: Landmarks on the Landscape:
Almost everything that you can see here is within the boundaries of Arches National Park, except the distant cliffs. Balanced Rock is about five miles (8 km) ahead.
ARCH_160716_199.JPG: The Rise and Fall of an Arch:
Like Living Things, arches have life cycles, too. Starting as small holes in rock faces, they enlarge and eventually collapse from weathering and erosion.
Water, whether from rain or snow, dissolves the natural cement (calcium carbonate) in the Entrada Sandstone. Sand grains once "glued" together as rock are separated and washed away, arches form, grow, mature and fall.
Although there are no major arches here at Courthouse Towers, the cycle is continuing. Look for Baby Arch in the rock wall to the left of Sheep Rock. Weathering over time will enlarge this growing arch until it finally collapses.
ARCH_160716_245.JPG: Ancient Sand Dunes:
This vast area was once covered by extensive sand dunes. Some 200 million years ago, winds from the northwest carried tons of fine-grained sand into this area, creating an immense desert.
Over time, the sand drifts were covered by other layers of sediment, compressed, and cemented by quartz and calcite into Navajo Sandstone.
Erosion has since washed away the overlying layers, exposing the "petrified" dunes.
ARCH_160716_309.JPG: Balanced Rock:
The forces of erosion are sculpting more than just arches. Balanced Rock clearly shows the various layers responsible for this amazing defiance of gravity.
The caprock of the hard Slick Rock Member of the Entrada Sandstone is perched upon a pedestal of mudstone. This softer Dewey Bridge Member of the Carmel Formation weathers more quickly than the resistant rock above. Eventually, the faster-eroding Dewey Bridge will cause the collapse of Balanced Rock.
Throughout the park, you can see other balanced rocks, spires, and pinnacles that form as different rock layers erode at different rates.
The size of Balanced Rock can be deceiving. Take a short lop trail (0.2 miles; 0.3 kilometers) for a closer look.
ARCH_160716_410.JPG: Name That Rock:
Have you been seeing things in the rocks? Some people have found a parade of elephants, a ham, a turret, spectacles, and the Garden of Eden.
Naturally eroded features of Arches National Park inspire the imagination of today's visitors just as they did in the 1920s and 1930s, when Arches was first mapped. The origin of many place names will never be known, but others can be traced to early miners, journalists, photographers, and former Arches superintendent Bates Wilson.
What tempts the human mind to find familiar shapes in the rocks? Is it a need to make sense of this weird jumbled landscape? Is it the joy of creativity or just pure playfulness? Whatever the reason, people have been seeing everything from the mundane to paradise in these landforms for around a century.
What creatures or objects do you see sculpted in the sandstone by water and time. Name your rock!
ARCH_160716_414.JPG: Double Arch Trail
ARCH_160716_416.JPG: Double Arch
At Double Arch, three major openings are enlarging side by side. They all began as one pothole arch.
ARCH_160716_423.JPG: Pothole Arch Formation:
Pothole arches start as depressions near cliff face.
Pools of water collect the slowly deepen the pothole. Over time, water seeps through the cliff face, forming an alcove.
Eventually, the enlarging pothole meets the roof of the expanding alcove, creating an opening. The arch matures as erosion continues.
ARCH_160716_539.JPG: Salt Valley:
Beneath the valley floor in front of you lies a thick layer of salt. Formed by the evaporation of ancient oceans, the salt became thousands of feet deep. Over the next 200 million years, this salt was buried by sand, silt, and other sediments. Under pressure, the less dense salt rose into a dome, partly dissolved, and then collapsed, creating Salt Valley.
ARCH_160716_585.JPG: Delicate Arch:
Carved in Entrada Sandstone, this free-standing arch is composed mostly of the Slick Rock Member. The top is a five-foot thick layer of Moab Tongue. A remnant of an ancient fin, the arch today has an opening of 45 feet (13.7 meters) high and 33 feet (10 meters) wide.
Water and time have sculpted Delicate Arch, and erosion continues to slowly wear away the features of this mature span. Although it will eventually succumb to the same forces that created it, this majestic arch now stands as an iconic feature of the American West.
ARCH_160716_641.JPG: Skyline Arch
Arches usually form slowly, but quick and dramatic changes do occur. In 1940, a large boulder suddenly fell out of Skyline Arch, roughly doubling the size of the opening.
AAA "Gem": AAA considers this location to be a "must see" point of interest. To see pictures of other areas that AAA considers to be Gems, click here.
Wikipedia Description: Arches National Park
From Wikipedia, the free encyclopedia
Arches National Park preserves over 2,000 natural sandstone arches, including the world-famous Delicate Arch, in addition to a variety of unique geological resources and formations.
The park is located near Moab, Utah, and is 119 square miles (309 kmē) in size. Its highest elevation is 5,653 feet (1,723 m) at Elephant Butte and its lowest elevation is 4,085 feet (1,245 m) at the visitor center. Since 1970, 42 arches have toppled because of erosion. Arches National Park receives 10 inches (250 mm) of rain a year on average.
The area, administered by the National Park Service, was originally designated as a national monument on April 12, 1929. It was redesignated a national park on November 12, 1971. More than 833,000 people visited it in 2006.
Features:
Among the notable features of the park are:
* Delicate Arch — a lone-standing arch which has become a symbol of Utah
* Balanced Rock — a large balancing rock, the size of three school buses
* Double Arch — two arches, one on top of the other
* Landscape Arch — a very thin, very long arch over 300 feet (100 m); the largest in the park
* Fiery Furnace — an area of maze-like narrow passages and tall rock columns (see biblical reference Fiery Furnace)
* Devil's Garden — with many arches and columns scattered along a ridge
* Dark Angel — a free-standing column of dark stone at the end of the Devil's Garden trail.
* Courthouse Towers — a collection of tall stone columns
* Petrified dunes — petrified remnants of sand dunes blown from the ancient lakes that covered the area.
Geology:
The national park lies atop an underground salt bed, which is the main cause of the formation of the arches and spires, balanced rocks, sandstone fins, and eroded monoliths in the area. Thousands of feet thick in places, this salt bed was deposited over the Colorado Plateau some 300 million years ago when a sea flowed in ...More...
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Directly Related Pages: Other pages with content (UT -- Arches Natl Park) directly related to this one:
[Display ALL photos on one page]:
2006_UT_Arches_Petro: UT -- Arches Natl Park -- Petroglyph trail (32 photos from 2006)
2006_UT_Arches: UT -- Arches Natl Park (73 photos from 2006)
2003_UT_Arches: UT -- Arches Natl Park (30 photos from 2003)
2002_UT_Arches: UT -- Arches Natl Park (41 photos from 2002)
Sort of Related Pages: Still more pages here that have content somewhat related to this one
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2006_UT_ArchesVC: UT -- Arches Natl Park -- Visitor Center (11 photos from 2006)
2016_UT_ArchesVC: UT -- Arches Natl Park -- Visitor Center (87 photos from 2016)
2016 photos: Equipment this year: I continued to use my Fuji XS-1 cameras but, depending on the event, I also used a Nikon D7000.
Seven relatively short trips this year:
two Civil War Trust conference (Gettysburg, PA and West Point, NY, with a side-trip to New York City),
my 11th consecutive San Diego Comic-Con trip (including sites in Utah, Nevada, and California),
a quick trip to Michigan for Uncle Wayne's funeral,
two additional trips to New York City, and
a Civil Rights site trip to Alabama during the November elections. Being in places where people died to preserve the rights of minority voters made the Trumputin election even more depressing.
Number of photos taken this year: just over 610,000.
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