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L2 Natural Bridge. Natural Bridges National Monument, Utah, USA
Position:
N37° 35'
W110° approx.
Elevation:
6000' / 1825m
Image format:
MF 35mm
NATURAL BRIDGES
NATURAL BRIDGES are rare but wonderful features formed by the
EROSION of rock. Here's how :
Imagine a river flowing around a bend or MEANDER. The water flows
fastest on the outside of the bend and ERODES the river bank.
What if the river was meandering through a canyon (see the photographs
of the GOOSENECKS L37 - 39). The river will erode the canyon walls on the outside of the
bends and may even break thorough to the other side. If the rock
is strong like this sandstone in the picture and bridge may be
formed and may remain until it eventually collapses.
Natural ARCHES are like BRIDGES but formed in a different way.
Pictures can be found can be found at several places in the regolith.com
library.
More detail
Image Trail:
L37 L38 L39 (Incised Meanders) L76 (Rainbow Bridge) & L58 - L62 (Natural Arches)
L37 Incised meanders. Goosenecks, San Juan River. Utah
L38 Incised meanders. Goosenecks, San Juan River. Utah
L39 Incised meanders. Goosenecks, San Juan River. Utah
L76 The Rainbow Bridge, Lake Powell, Utah, USA
L58 Rock Fins (I). Arches National Park. Utah, USA
L59 Rock Fin (II). Arches National Park. Utah, USA
L60 Landscape Arch. Arches National Park. Utah, USA
L61 An evolving Arch. Arches National Park. Utah, USA
L62 The End & the Beginning of Arches. Arches Ntnl Park.
Links:
http://geography.com.sg/rivers/index.html
www.ccsi.com/~jwilbur/nabs/gallery.htm
www.desertusa.com/gc/rainbow/rainbow.html |
