Arches and Natural Bridges
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Is Fairy Bridge the Longest Span on Earth?
Newsletter of the Natural Arch and Bridge Society Vol. 21, No. 3 July 2009 Is Fairy Bridge the Longest An excellent article in the Utah Geological Span on Earth? Survey publication Survey Notes in May 2009 credited NABS with finally settling the ques- tion of what is the world’s longest natural arch (go to tinyurl .com/surveynotes for a 3.7 MB PDF copy). The article accurately described the issues that are involved in defining and measuring the sizes of natural arches, and pointed out that in October 2006, Jay Wilbur of NABS led a team that obtained a precision measurement of Kolob Arch and found its span to be some three feet less than that of Landscape Arch (see “Kolob Arch Measured,” SPAN, Jan. 2007). The article did refer, how- ever,to a “cloud of uncertainty” that still hung over the results “because of stories of a great arch in China that could eclipse them all.” The story about Landscape Arch being the longest in the world was picked up by the Associated Press and carried in a num- ber of newspapers around the country. Al- though this was very nice publicity for NABS, it is a twist of irony that just as the story came out we were revising the list of giant arches on the NABS website to include not one but four natural arches in China with spans over 200 feet. One of these, Fairy Bridge, may even have a span greater than Landscape Arch. Before providing details about these four arches, it is of interest how the information By was obtained. -
Natural Rock a R C H E S the Director’S
UTAH GEOLOGICAL SURVEY SURVEY NOTES Volume 41, Number 2 May 2009 U t a h ’ s Natural Rock A r c h e s The Director’s Perspective predominantly rising trends since price now close to that of Japan, which ranks minima in late December 2008. second after the U.S. Furthermore, China’s economy is projected to grow by The dramatic price swings from record 8 percent in 2009 despite the global reces- highs during mid- to late 2008 are likely sion. China’s pursuit of a higher standard to make 2008 a historically important of living is rapidly consuming recent sur- year for revenue generated from geologic pluses in commodity supplies caused by commodities extracted in Utah. The graph the global downturn, and may already be below shows the updated, inflation-adjust- contributing to rising base metal prices. ed trends since 1960. The gross revenue Although the U.S. economy may take for 2008 exceeds 2007 by over $1 billion, several years to bounce back from its and hits a new high of close to $10 billion. financial and housing market problems, Half the total is from non-fuel minerals expect to see many commodity prices (primarily copper and molybdenum), and begin to grow again this year. The mining by Richard G. Allis half is from fossil fuels (primarily natural industry has gone from boom to bust in gas). With most commodities now at prices only six months, but perhaps this industry less than half their peak, 2008 is likely to is already on the road to recovery. -
A Utahalphabet
60961_Jacket.3:AlphaJacket.temp 7/28/10 10:36 AM Page 1 A is for Arches A is for Discover America Becky Hall Discover America state by state with other alphabet books State by State A is for Arches Becky Hall is an elementary school teacher and by Sleeping Bear Press COLLECT ALL 51 BOOKS librarian, and lives in Salt Lake City, Utah, with her A Utah Alphabet husband and two children. She is an active member of her local library/media association and the Society What do the Mormon Tabernacle Choir, the Sego lily, of Children’s Book Writers & Illustrators. She loves h A and the Utahraptor have in common? They are children’s bookstores and regularly attends writing a lp t ha among the many treasures offered by the state of workshops. In her free time Becky hikes in the U b e Utah and featured in A is for Arches: A Utah Alphabet. mountains of Utah with her dogs. t A Readers of all ages will enjoy this guided A-Z tour that showcases state symbols and history in an enter- Katherine Larson Utah taining and educational format. Beginning readers will enjoy the simple rhymes, Katherine Larson sold her first painting at the age while older children discover facts about each topic of 14. She is currently a classical singer, an illustrator, letter in the sidebar expository. a muralist, and the owner of Diva Designs in Ann Arbor, Michigan. Her work has taken her across the We’ll start with Utah’s Arches, United States for murals in private homes, institutions, made from wind, frost, and rain. -
The Dimensions of Landscape Arch in Arches National Park, Utah
The Dimensions of Landscape Arch Eagle in Park Arches National Park, Klondike Bluffs La_nds_ca_]D_e Arc_h_ Utah Fiery Furnace Wolfe Dale J. Stevens Ranch Herdina Geography Department Park Brigham Young University Provo, Utah January 1985 The Dimensions of Landscape Arch in Arches National Park, Utah The long graceful span and relatively large size of Landscape Arch sets it apart from all other natural arches in southern Utah. Although its existence was probably known by early explorers, trappers and ranchers, it first became known as Landscape Arch in 1934 when the Arches National Monument Scientific Expedition led by Frank A. Beckwith gave it the name. Because of its unusually large size, which has been claimed by some as being the largest in the world, it has become a focal point of interest to those who enjoy knowing as much as possible about such features of the earth's surface. Several publications which deal with the features of Arches National Park give some dimensions to the arch, although they usually do not indicate how or by whom the measurements were made. Even if it is known who made the measurements, it is difficult to find out the details of how they were made and exactly what points on the arch were used to make the measurements. The most common value quoted for the size of the arch is that it is "291 feet long" (see Lohman p. 90, Hoffman p. 83 and official park pamphlets). If in fact Landscape Arch is the largest natural arch in the world, it would be desirable to know its true dimensions. -
THE DIRECTOR's
UTAH GEOLOGICAL SURVEY SURVEY NOTES Volume 44, Number 1 January 2012 NORTHWEST UTAH UTAH'S NEWEST ENERGY HOTSPOT? The Director’s Perspective and gold production to contribute $3.3 billion and especially since the economic downturn to this figure. In addition, Utah continues that began in late 2008. The downturn has to be a strong net exporter of energy in the significantly affected the consumption of form of natural gas and electricity, largely industrial minerals such as aggregate (sand, generated from coal. Utah produces about gravel, crushed stone) and cement, which are 30 percent more energy than it consumes, down by over 30 percent since they peaked in a trend that has continued since the early 2007 (for a historical review, see “Director’s 1980s (see graphs of production and con- Perspective” in the September 2009 issue of sumption of energy in Utah). Declining coal Survey Notes). Similarly, the consumption of production since 2001 has largely been com- petroleum products in Utah has decreased by Richard G. Allis pensated for by increases in natural gas and by about 10 percent during this time, largely oil production. due to a decrease in diesel fuel use, with The Utah Geological Survey has recently motor gasoline demand remaining rela- Utah’s overall energy consumption has produced two important reports that will tively steady. As a result of this decline and help inform discussions about Utah’s grown at an average of 2.1 percent per year economic directions. One is a second edition since 1960, a figure very close to the state’s continued on page 5 of “Utah’s Energy Landscape” (UGS Circular average popula- 10,000 113, by Michael Vanden Berg), which shows tion growth over energy production and consumption trends that time (2.3 9,000 updated with 2010 data. -
Natuurlijke Bruggen En Vrijstaande Rotsbogen
GEOLOGIE TEKST • MICHAEL OARD Je zult de indrukwekkende structuren vast wel kennen uit cowboyfilms: grote natuurlijke bruggen en vrijstaande rotsbogen. Hoe zijn ze gevormd? Boogachtige rotsformaties zijn er in allerlei soorten en maten. Om te beginnen zijn er na- tuurlijke bruggen. Kenmerkend is dat die door- gaans een waterstroom overspannen, maar die kan intussen ook al droog zijn gevallen. Drie van de grootste en meest indrukwekkende na- Sipapu Natural Bridge. tuurlijke bruggen ter wereld vind je in Zuidoost- Utah (VS). Twee daarvan bevinden zich boven ravijnen (White Canyon en Armstrong Canyon). Die twee zijn duidelijk geërodeerd door water dat door de ravijnen stroomde. De derde – en de grootste – is Sipapu Natural Bridge (zie hier- NATUURLIJKE boven): 67 meter hoog en 82 meter breed. VRIJSTAANDE ROTSBOGEN Naast natuurlijke bruggen zijn er ook rotsbo- gen. Het verschil ertussen is dat je een rotsboog niet in verband kunt brengen met een water- BRUGGEN stroom. Ze zijn anders gevormd. Vrijstaande rotsbogen tref je aan bij bergkammen. De MAAK KENNIS MET HET RAADSEL VAN grootste bogen zijn hoog genoeg om de koepel AMERIKA’S VRIJSTAANDE BOGEN van het Capitool (het gebouw in Washing- ton waar het Amerikaanse congres zetelt) te overspannen. Landscape Arch is de op een na langste rotsboog ter wereld: 88 meter. Deze ligt in Arches National Park, ook in Utah. Daar vind je de meeste natuurlijke bogen per vierkante kilometer. Er zijn er meer dan 2000 in het park, Het is niet moeilijk te begrijpen waarom de 84 meter hoge Rainbow Bridge door en elke boog is uniek. de Amerikaanse indianen in dat gebied als een heilige plek wordt gezien.