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Topic: Rift Valley


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In the News (Tue 23 Apr 19)

  
 Rift valley Summary
Rifts commence as intracratonic, down-thrown blocks dominated by normal or oblique-extensional (transtensional) faults (e.g., the Rhine Graben in Germany and the East African Rift).
Rift valleys typically appear as a downdropped graben between a pair of faults, or vertical Earth movements.
Rift valleys are often associated with and flanked by volcanoes.
www.bookrags.com /Rift_valley   (920 words)

  
  Rift Valley Fever Facts   (Site not responding. Last check: 2007-10-20)
Rift Valley fever is a fever-causing viral disease that affects livestock and humans in Africa.
Rift valley fever is a fever-causing disease that affects livestock (including cattle, buffalo, sheep, and goats) and humans in Africa.
The disease is caused by the Rift Valley fever virus.
www.astdhpphe.org /infect/rift.html   (834 words)

  
 Great Rift Valley - Wikipedia, the free encyclopedia
To the south in Israel, it is known as the Hula Valley separating between the Galilee mountains and the Golan Heights.
In Kenya the valley is deepest to the north of Nairobi.
As the lakes in the Eastern Rift have no outlet to the sea, these lakes tend to be shallow and have a high mineral content as the evaporation of water leaves the salts behind.
en.wikipedia.org /wiki/Great_Rift_Valley   (740 words)

  
 Department of Agriculture | Rift Valley Fever
Rift Valley fever results from infection by the Rift Valley fever virus, an RNA virus in the genus Phlebovirus (family Bunyaviridae).
The Rift Valley fever virus is susceptible to low pH, lipid solvents and detergents, ether, chloroform and solutions of sodium or calcium hypochlorite with a residual chlorine content greater than 5000 ppm.
Infection with the Rift Valley fever virus usually results in an asymptomatic infection or a relatively mild illness with fever and liver abnormalities.
www.state.nj.us /agriculture/divisions/ah/diseases/riftvalley.html   (1696 words)

  
 USATODAY.com - Feds alert to health threat of new mosquito disease   (Site not responding. Last check: 2007-10-20)
Rift Valley fever, which originated in Africa and hasn't been seen outside that continent in three years, is the only disease at the top of both human health and agriculture lists of dangerous diseases.
Scientists said that Rift Valley fever was being researched as a possible weapon during the Cold War and showed promise because of its stability in an aerosol form.
Rift Valley fever is one of several emerging viruses being studied by the University of Texas Medical Branch in Galveston, Texas.
www.usatoday.com /news/health/2004-06-23-rift-valley_x.htm   (656 words)

  
 UAB - Bioterrorism
Rift Valley Fever (RVF) is an acute, febrile, mosquito-borne and aerosol transmitted viral disease which affects both livestock and humans, primarily in Africa and on the Arabian Peninsula.
The virus, a three-stranded RNA virus in the Phlebovirus genus of the family Bunyaviridae, was first identified in the great Rift Valley of East Africa in 1931 during cattle and sheep epizootics.
Rift Valley Fever is considered both a significant biological warfare threat and a severe natural emerging disease threat to the United States, as the afore-mentioned case numbers illustrate.
www.bioterrorism.uab.edu /EI/riftValley/summary.asp   (1190 words)

  
 Rift valley - Wikipedia, the free encyclopedia
Rift valleys typically appear as a downdropped graben between a pair of faults, or vertical Earth movements.
Rift valleys are often associated with and flanked by volcanoes.
The most extensive rift valley is located along the crest of the mid-ocean ridge system and is the result of seafloor spreading.
en.wikipedia.org /wiki/Rift_valley   (195 words)

  
 Using Satellites to Track Rift Valley Fever
Rift Valley Fever (RVF), at least in the African country of Kenya, has been well known for over 60 years.
As early as 1913, a disease fitting the description of RVF was blamed for the loss of sheep in the Rift Valley in Kenya.
However, it was not until scientists studied an outbreak of the disease in 1931 that a virus was isolated and shown to cause the disease.
www.odysseyofthemind.com /riftvalley.php   (787 words)

  
 WWF - Rift Valley Lakes - A Global Ecoregion
The Great Rift Valley, created by the moving of tectonic plates beneath the crust of Africa, is home to many lakes that harbour extraordinary endemic species.
The species radiations of cichlids in the Rift Valley lakes rival radiations of terrestrial fauna in the Galápagos and serve as a classic example of evolutionary adaptation.
The Rift Valley lakes are primarily known for the extensive radiations of fish species in the family Cichlidae.
www.panda.org /about_wwf/where_we_work/ecoregions/rift_valley_lakes.cfm   (604 words)

  
 The Rio Grande Rift
The rift is formed where a section of the Earth’s crust arched, weakened, and spread apart due to heat from basaltic magma welling up from the mantle 29 million years ago.
West of the rift the crust of the Colorado Plateau is approximately 45 kilometers thick; east of the rift the crust beneath the Great Plains is 50 kilometers thick; beneath the rift zone the crust is only 35 kilometers thick (Chapin and Cather, 1994).
The onset of rifting coincided with a period of intense volcanism associated with the early rift basins – as is common in other rift valleys of the world.
home.att.net /~sgeoveatch/rio_grande_rift.htm   (1766 words)

  
 Rift Valley Fever, Kenya | CDC Travelers' Health
Generally, the risk of Rift Valley fever infection is low for travelers, unless they are in areas where an outbreak is occurring and are bitten by infected insects or come in contact with body fluids and aerosols from infected animals (primarily livestock).
Rift Valley fever is a viral disease which periodically occurs in sub-Saharan Africa where sheep and cattle are raised, but the virus has also occurred in Egypt, the Arabian Peninsula, and Madagascar.
Although the virus is usually transmitted by infected mosquitoes and possibly other biting insects that have virus-contaminated mouthparts, Rift Valley fever virus is occasionally transmitted to humans through contact with the blood, body fluids, or tissues of infected animals (e.g., exposure through veterinary or obstetric procedures or direct exposure during slaughter).
www.cdc.gov /TRAVEL/other/2006/rift_valley_fever_kenya.htm   (553 words)

  
 Geography of the Sequatchie Valley
The Sequatchie Valley in southeastern Tennessee (and Browns Valley in northeastern Alabama) is one of the most recognizable non-coastal landforms in the eastern United States.
At the crest of the Sequatchie Valley anticline (an upward fold), Pennsylvanian sandstone was breached by erosion.
The valley subsequently developed by headward erosion of drainage tributary to the Tennessee, and by underground solution of structurally elevated limestones where overlying formations were breached.
www.ilstu.edu /~sgkuntz/research/IntroSequatchie.html   (1316 words)

  
 Disease News - Rift Valley Fever
Rift Valley fever in Yemen - Update 4, World Health Organization, 26 October 2000 -- As of 19 October, the Ministry of Public Health in Yemen has reported 653 suspected cases, including 80 deaths.
Rift Valley fever in Saudi Arabia - Update 3, World Health Organization, 25 October 2000 -- As of 23 October 2000, 443 cases with 85 deaths of Rift Valley fever were reported by the Ministry of Health of Saudi Arabia.
Rift Valley fever in Yemen - Update 2, World Health Organization, 03 October 2000 -- As of 2 October, 321 suspected cases of Rift Valley fever (RVF) with 32 deaths have been reported in Yemen.
www.fas.org /ahead/disease/rvf/2000   (427 words)

  
 CIDRAP >> Rift Valley Fever
Rift Valley fever (RVF) is caused by a hemorrhagic fever virus (RVF virus) that causes disease in both humans and animals.
Rift Valley fever epizootic in Egypt: description of the epizootic and virological studies.
Rift Valley fever (infectious enzootic hepatitis of sheep and cattle.
www.cidrap.umn.edu /cidrap/content/biosecurity/ag-biosec/anim-disease/rvf.html   (1794 words)

  
 [No title]
Along the Rift Valley are some of the world's largest lakes, Malawi (30040sq km or 11600 sq miles), the 676km (420 mile) a long Tanganvika and the sea-like Victoria - 70484 sq km or 26828 sq miles.
The main section of the valley in Africa continues from the Red Sea across Ethiopia and across Kenya, Tanzania, and Malawi to the lower Zambezi River valley in Mozambique.
The Rift Valley escarpment and views over the valley floor are best seen in Kenya, as the valley is at its narrowest between the Mau Escarpment and the Aberdare mountains.
www.lycos.com /info/great-rift-valley.html   (536 words)

  
 Rift Valley Machinery Sales And Services Ltd   (Site not responding. Last check: 2007-10-20)
Rift Valley Machinery Services Limited is a top supplier of Pumps, generators, gensets tricyles, bareshaft engines and other machinery in the east african region.
In 2002, a subsidiary named Rift Valley Machinery Tanzania Limited was opened in Dar-es-Salaam, Tanzania.
Rift Valley Machinery Services Limited will endeavour to build long-lasting partnerships with our suppliers and customers and do our best to build trust by dealing with them with respect and integrity particularly in matters concerning finances.
www.riftvalleymachinery.com   (191 words)

  
 tanzania's great rift valley
Created by the rifting and tectonic forces of East Africa and Saudi Arabia millions of years ago, the Great Rift Valley is actually divided into two forks, the eastern rift and the western rift.
Evidence of volcanic activity along the rift is seen by the presence of numerous boiling hot springs.
Named by the explorer John Walter Gregory, the Rift Valley is continuously moving and in a few million years, eastern Africa will probably split off to form a new land mass.
www.ngorongorocrater.com /Attractions/greatrift.php   (273 words)

  
 Kenya, Africa - The Rift Valley, Kenya   (Site not responding. Last check: 2007-10-20)
This geologic phenomena, dubbed the Great Rift Valley by the Scottish explorer John Walter Gregory, divides Kenya neatly down the length of the country essentially separating east from west.
Today's Rift Valley is characterized by uninhabitable desert and fertile farmland, flat arid plains and steep escarpments.
Subterranean movement is common today as the Rift Valley is home to thirty active and semi-active volcanoes and countless hot springs along its length.
www.jambokenya.com /jambo/location/rvalley.htm   (349 words)

  
 Rift Valley fever definition - Medical Dictionary definitions of popular medical terms
Rift Valley fever: A viral disease that is acute, causes fever in domestic animals (such as cattle, buffalo, sheep, goats, and camels) and humans, and is associated with mosquito-borne epidemics during years of heavy rainfall.
Rift Valley fever has not occurred in the United States (through 2003).
Rift Valley fever is caused by the RVF virus.
www.medterms.com /script/main/art.asp?articlekey=14875   (676 words)

  
 Rift Valley Fever   (Site not responding. Last check: 2007-10-20)
Rift Valley Fever (RVF) virus was first isolated from a lamb in 1930.
Throughout the 20th century, large epizootics (outbreaks in animals) of RVF were observed, starting as early as 1912.
Since a vaccine exists for Rift Valley Fever, vaccination of livestock is the most effective means of prevention.
www.stanford.edu /group/virus/bunya/2005/riftvalleyfever.html   (468 words)

  
 Thomson Safaris - Newsletter Issue 25
Slicing across 4,500 miles from the Dead Sea in the north to Mozambique in the south, it forms the largest visible rift on earth, although a few larger rifts lie under the waters of the Atlantic, Pacific and Indian oceans.
Shifting tectonic plates formed the Great Rift about 30 million years ago when the plates of Africa and Eurasia crashed together, then pulled apart and caused huge landslides to empty rock from the earth's surface deep inside its crust.
Water has collected in the valley to form bodies of water like Lake Natron, which hosts hundreds of thousands of flamingos, and Lake Eyasi, which forms the eastern boundary of land occupied by the Eastern Hadza people.
thomsonsafaris.com /newsletter/nl25_riftvalley.htm   (357 words)

  
 Rift Valley Fever - WrongDiagnosis.com
Rift Valley fever (RVF) is an acute, fever-causing viral disease that affects domestic animals (such as cattle, buffalo, sheep, goats, and camels) and people.
The prognosis of Rift Valley Fever may include the duration of Rift Valley Fever, chances of complications of Rift Valley Fever, probable outcomes, prospects for recovery, recovery period for Rift Valley Fever, survival rates, death rates, and other outcome possibilities in the overall prognosis of Rift Valley Fever.
Rift Valley Fever in Kenya - This study is currently recruiting patients (Current: 23 Nov 2006)
www.wrongdiagnosis.com /r/rift_valley_fever/intro.htm   (789 words)

  
 African Rift Valley   (Site not responding. Last check: 2007-10-20)
A rift valley is a place where the earth's crust pulls apart and cracks, allowing hot magma to rise to the surface.
Rifts like the African Rift Valley form in the earth's crust along "spreading centers," where two plates slide apart, and rising magma hardens into new crust.
In undersea rifts, like the one in the middle of the Atlantic ocean, a mid-ocean ridge is formed as the sea floor spreads apart.
www.letus.northwestern.edu /projects/esp/top10/riftvalleypage/riftvalley.html   (337 words)

  
 MDTravel Health - Rift Valley Fever
Rift Valley fever is a viral infection that primarily affects domesticated animals, chiefly sheep, cattle, goats, and camels, but may involve humans as well.
Historically, the disease has been limited to Africa, but a major outbreak was recently reported from Saudia Arabia and Yemen, demonstrating the potential of Rift Valley fever to spread to other regions.
Strict barrier and respiratory precautions are essential when patients with suspected Rift Valley fever are admitted to the hospital.
www.mdtravelhealth.com /infectious/rift_valley_fever.html   (222 words)

  
 Rift Valley Release
Using weather satellites to spot the early signs of an El Nino, scientists may be able to help save East Africans and their livestock from Rift Valley Fever, a mosquito-borne disease that can be fatal to humans and animals.
The Rift Valley Fever virus is passed into the eggs of Aedes mosquitoes.
NASA research into the El Nino phenomena and the subsequent study of Rift Valley Fever are part of NASA's Earth Science Enterprise, Washington, DC, dedicated to the long-term study of how human-induced and natural changes affect the global environmental system.
www.gsfc.nasa.gov /gsfc/earth/rvalley/rvalley.htm   (851 words)

  
 The Great Rift Valley Circuit - Best of Kenya
The Rift Valley is one of the wonders of the world, stretching from the Middle East, down through Africa, reaching as far as Mozambique.
Whilst this stunning introduction to the Rift valley is amazing in itself, actually descending and exploring the Lakes area of the Rift in Kenya is a "not to be missed" opportunity.
As you travel through this small section of the entire Rift Valley with the rising Mau Escarpment on one side, and the Aberdare Mountains on the other, the lush, green forests of these mountain ranges frame the arid landscape of the Valley floor.
www.bestofkenya.com /Rift.htm   (729 words)

  
 African Rift Valley Exhibit Page
For those with an adventurous streak, the African Rift Valley offers the opportunity to walk along a safari discovery trail that is immersed inside the ARV animal yard.
African Rift Valley’s innovative design is by Gary Lee of CLR Design of Philadelphia.
The African Rift Valley exhibit is the first project undertaken in the Zoo’s $50 million Master Plan.
www.cmzoo.org /africanriftvalley.html   (1453 words)

  
 The Great Rift Valley Circuit
The Rift Valley is one of the wonders of the world, stretching from the Middle East, down through Africa to Mozambique.
Whilst this stunning introduction to the Rift Valley is amazing in itself, actually descending and exploring Kenya's Rift Valley lakes is a "not to be missed" opportunity.
As with all of the Rift Valley parks, Hell's Gate is also an ornithologist's dream with the cliffs acting as the breeding grounds for vultures, Verreaux eagles, Auger buzzards and thousands of swifts.
www.eco-resorts.com /RiftValley.php   (677 words)

  
 Rift Valley - Picture - MSN Encarta
Rift valleys are long, deep valleys bounded by parallel faults.
They form where Earth’s crust is being pulled apart.
Rift valleys can appear on land or beneath bodies of water.
encarta.msn.com /media_701501799_761572628_-1_1/Rift_Valley.html   (30 words)

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