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Utah: Natural Bridges National Monument

18 images Created 27 May 2015

In Natural Bridges National Monument (near Blanding, San Juan County, Utah, USA), walk to three spectacular natural bridges (visited separately from roadside pullouts or connected via a worthwhile loop hike of 6 or 9 miles). White Canyon Creek has cut Sipapu Natural Bridge with a span of 225 feet through a meander of white Permian sandstone of the Cedar Mesa Formation. Kachina Bridge spans 192 feet. Owachomo Bridge spans 180 feet. More photos by Tom Dempsey include: yellow wallflower (Erysimum asperum) growing in black cryptobiotic soil crust, and desert varnish coating gorgeous walls.

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  • Desert varnish streaks Sipapu Bridge, in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. White Canyon Creek has cut Sipapu Natural Bridge with a span of 225 feet (with a height of 144 feet, width of 41 feet, and thickness of 53 feet, says www.naturalarches.org) through a meander of white Permian sandstone of the Cedar Mesa Formation. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest. This panorama was stitched from 4 overlapping photos.
    1503SW-0954-57pan_Sipapu-Natural-Bri...jpg
  • Kachina Bridge in Natural Bridges National Monument, near Blanding, Utah, USA. White Canyon Creek has cut Kachina Bridge with a span of 192 feet through white Permian sandstone of the Cedar Mesa Formation. Kachina is named for rock art on the bridge that resembles symbols commonly used on kachina dolls. This panorama was stitched from 8 overlapping photos.
    1503SW-0895-902pan_Kachina-Natural-B...jpg
  • Owachomo Natural Bridge is in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. Owachomo Natural Bridge is an old natural bridge which was eroded through a meander of white Permian sandstone of the Cedar Mesa Formation by a now-abandoned channel of Tuwa Canyon Creek. Owachomo Bridge has a laser-measured span of 180 feet and a height of 86 feet; with a width of about 27 feet and thickness of 9 feet.
    1503SW-1021_Owachomo-Natural-Bridge.jpg
  • A yellow wallflower (Erysimum asperum) plant grows in black cryptobiotic soil crust in Natural Bridges National Monument, near Blanding, Utah, USA. Because the Monument has been closed to grazing for nearly a century, and off-road motorized travel is restricted, Natural Bridges contains extensive areas of undisturbed, mature cryptobiotic soils. This knobby, black crust is dominated by cyanobacteria, but also includes lichens, mosses, green algae, microfungi, and bacteria. Also known as biological soil crust, this living groundcover forms the foundation of high desert plant life throughout canyon country.
    1503SW-0865_wallflower_cryptobiotic-...jpg
  • Desert varnish coats sandstone in Natural Bridges National Monument, near Blanding, Utah, USA. Manganese-rich desert varnish requires thousands of years to coat a rock face that is protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest.
    1503SW-0931_Desert-varnish.jpg
  • Kachina Bridge in Natural Bridges National Monument, near Blanding, Utah, USA. White Canyon Creek has cut Kachina Bridge with a span of 192 feet through white Permian sandstone of the Cedar Mesa Formation. Kachina is named for rock art on the bridge that resembles symbols commonly used on kachina dolls. This panorama was stitched from 6 overlapping photos.
    1503SW-0905-910pan_Kachina-Natural-B...jpg
  • Desert varnish streaks Sipapu Bridge, in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. White Canyon Creek has cut Sipapu Natural Bridge with a span of 225 feet (with a height of 144 feet, width of 41 feet, and thickness of 53 feet, says www.naturalarches.org) through a meander of white Permian sandstone of the Cedar Mesa Formation. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest. This panorama was stitched from 11 overlapping photos.
    1503SW-0983-93pan_Sipapu-Natural-Bri...jpg
  • Desert varnish streaks Sipapu Bridge, in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. White Canyon Creek has cut Sipapu Natural Bridge with a span of 225 feet (with a height of 144 feet, width of 41 feet, and thickness of 53 feet, says www.naturalarches.org) through a meander of white Permian sandstone of the Cedar Mesa Formation. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest.
    1503SW-0962_Sipapu-Natural-Bridge.jpg
  • Kachina Bridge in Natural Bridges National Monument, near Blanding, Utah, USA. White Canyon Creek has cut Kachina Bridge with a span of 192 feet through white Permian sandstone of the Cedar Mesa Formation. Kachina is named for rock art on the bridge that resembles symbols commonly used on kachina dolls. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest. This panorama was stitched from 5 overlapping photos.
    1503SW-0880-1-5pan_Kachina-Natural-B...jpg
  • Kachina Bridge in Natural Bridges National Monument, near Blanding, Utah, USA. White Canyon Creek has cut Kachina Bridge with a span of 192 feet through white Permian sandstone of the Cedar Mesa Formation. Kachina is named for rock art on the bridge that resembles symbols commonly used on kachina dolls. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest. This panorama was stitched from 4 overlapping photos.
    1503SW-0913-18pan_Kachina-Natural-Br...jpg
  • Desert varnish streaks White Canyon in Natural Bridges National Monument, near Blanding, Utah, USA. Manganese-rich desert varnish requires thousands of years to coat a rock face that is protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest.
    1503SW-0933_Desert-varnish.jpg
  • Desert varnish streaks Sipapu Bridge, in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. White Canyon Creek has cut Sipapu Natural Bridge with a span of 225 feet (with a height of 144 feet, width of 41 feet, and thickness of 53 feet, says www.naturalarches.org) through a meander of white Permian sandstone of the Cedar Mesa Formation. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest.
    1503SW-0938_Sipapu-Natural-Bridge.jpg
  • Desert varnish streaks Sipapu Bridge, in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. White Canyon Creek has cut Sipapu Natural Bridge with a span of 225 feet (with a height of 144 feet, width of 41 feet, and thickness of 53 feet, says www.naturalarches.org) through a meander of white Permian sandstone of the Cedar Mesa Formation. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest.
    1503SW-0949_Sipapu-Natural-Bridge.jpg
  • Desert varnish streaks Sipapu Bridge, in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. White Canyon Creek has cut Sipapu Natural Bridge with a span of 225 feet (with a height of 144 feet, width of 41 feet, and thickness of 53 feet, says www.naturalarches.org) through a meander of white Permian sandstone of the Cedar Mesa Formation. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest.
    1503SW-0970-p1_Sipapu-Natural-Bridge.jpg
  • Desert varnish streaks Sipapu Bridge, in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. White Canyon Creek has cut Sipapu Natural Bridge with a span of 225 feet (with a height of 144 feet, width of 41 feet, and thickness of 53 feet, says www.naturalarches.org) through a meander of white Permian sandstone of the Cedar Mesa Formation. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest.
    1503SW-0951_Sipapu-Natural-Bridge.jpg
  • Desert varnish streaks white Permian sandstone of the Cedar Mesa Formation in White Canyon, in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest.
    1503SW-0958_desert-varnish_White-Can...jpg
  • White Canyon Creek has cut Sipapu Natural Bridge (center) through a streambed meander of white Permian sandstone of the Cedar Mesa Formation, in Natural Bridges National Monument, near Blanding, San Juan County, Utah, USA. Sipapu Natural Bridge spans 225 feet with a height of 144 feet, width of 41 feet, and thickness of 53 feet, says www.naturalarches.org. This panorama was stitched from 2 overlapping photos.
    1503SW-1012-13pan_Sipapu-Natural-Bri...jpg
  • Kachina Bridge hikers, in Natural Bridges National Monument, near Blanding, Utah, USA. White Canyon Creek has cut Kachina Bridge with a span of 192 feet through white Permian sandstone of the Cedar Mesa Formation. Kachina is named for rock art on the bridge that resembles symbols commonly used on kachina dolls. Manganese-rich desert varnish requires thousands of years to coat a rock face protected from precipitation and wind erosion. The varnish likely originates from airborne dust and external surface runoff, including: clay minerals, oxides and hydroxides of manganese (Mn) and/or iron (Fe), sand grains, trace elements, and usually organic matter. Streaks of black varnish often occur where water cascades over cliffs protected from wind. Varnish color varies from shades of brown to black. Manganese-poor, iron-rich varnishes are red to orange, and intermediate concentrations are shaded brown. Manganese-oxidizing microbes may explain the unusually high concentration of manganese in black desert varnish, which can be smooth and shiny where densest.
    1503SW-0924_Kachina-Natural-Bridge.jpg
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