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	Earlham College - Geology 211 - Ol Doinyo Lengai
		In contrast, the lava at Ol Doinyo Lengai is composed largely of sodium and potassium carbonate (Na,K(CO3)2).
		The minerals that dominate the lava at Ol Doinyo Lengai are nyerereite and gregoryite, carbonates that contain a high percentage of sodium and potassium.
		In the case of Ol Doinyo Lengai, carbonate-enriched melt is left behind as silica bearing crystals are separated.
	www.earlham.edu /~graveti/oldoinyolengai.htm (1126 words)

	Ol Doinyo Lengai - Wikipedia, the free encyclopedia
		Ol Doinyo Lengai is a volcano located in Tanzania and is part of the volcanic system of the Great Rift Valley in eastern Africa.
		Ol Doinyo Lengai is unique among volcanoes in that it produces natro-carbonititic lava, an unusual type of carbonatite.
		The sodium and potassium carbonate minerals of the lavas formed by Ol Doinyo Lengai are unstable at the Earth's surface and susceptible to rapid weathering, quickly turning from fl to grey in color.
	en.wikipedia.org /wiki/Ol_Doinyo_Lengai (241 words)

	Ol Doinyo Lengai Mountain :: Maasai Mountain of God :: Mountain Oldoinyo Lengai
		Ol Doinyo Lengai is a stratovolcanic mountain located within the Ngorongoro C.A, rises abruptly above the plain south of Lake Natron, with 2.751meters above sea level.
		Ol Doinyo Lengai is the only remaining active volcanic mountain in Tanzania (last active eruption 1983) though there are numerous small eruptions happen now and then.
		Ol doinyo Lengai worshiped by "Maasai as Mountain of God" is located in the African Rift valley about 120 km North West of Arusha.
	www.utalii.com /Ngorongoro/Ol_Doinyo_Lengai.htm (273 words)

	Ol Doinyo Lengai, Tanzania
		Ol Doinyo Lengai is a symmetrical strato-volcano in the African Rift Valley which rises abruptly above the plain south of Lake Natron.
		The cone-building stage of Ol Doinyo Lengai ended about 15,000 years ago and was followed by periodic ejection of natrocarbonatite and nephelinite tephra during the Holocene.
		Historical eruptions have consisted of smaller tephra eruptions and emission of numerous natrocarbonatite lava flows on the floor of the summit crater.
	users.bendnet.com /bjensen/volcano/africa/tanzania-lengai.html (429 words)

	First Mountain Bike Descent of Ol Doinyo Lengai
		Ol Doinyo Lengai is a 9,482 foot active volcano.
		The "fl lava" of Lengai burns at a relatively low temperature of around 500 degrees Fahrenheit, as opposed to the temperatures of regular lava which exceed 2,000 degrees.
		I traveled to Lengai and climbed to the summit rim in May of '95, and the first thing that came to mind was a mountain bike descent.
	www.intoadventure.com /Current/Lengai.htm (1114 words)

	[No title] (Site not responding. Last check: 2007-11-03)
		The symmetrical Ol Doinyo Lengai stratovolcano is the only volcano known to have erupted carbonatite tephras and lavas in historical time.
		During 4-9 August, Ol Doinyo Lengai was in a heightened state of volcanic activity.
		Around 0210, part of an expedition camp in the crater of Ol Doinyo Lengai was destroyed by extremely fluid pahoehoe lava flows.
	www.volcano.si.edu /reports/usgs/archive.cfm?volcano=lengai (615 words)

	Chagga Tours - Kilimanjaro and Mt. Meru mountain tours
		Ol Doinyo Lengai is Tanzania’s only active volcano although on a tour of Kilimanjaro and a sightseeing trip to the crater we saw some smoke there.
		Ol Doinyo Lengai is also the sacred mountain of the Masai and the mountain guide always comes from a small Masai village close to the mountain.
		The Ol Doinyo Lengai lies near Lake Natron and who still has ‘Out of Africa’; in his or her ears knows that this area was not a place for the white man. Today it is, as the Masai are also interested in making a profit from tourism.
	www.chagga-tours.de /english/content/c-kilimanjaro-mountain-tour.html (2444 words)

	Strangest Volcano on Earth @ National Geographic Magazine (Site not responding. Last check: 2007-11-03)
		Though Ol Doinyo Lengai's fresh natrocarbonatite lavas—which erupt at around 1,000 degrees Fahrenheit (538 degrees Celsius)—are roughly half as hot as more common basalt lavas, the spattering drops of molten rock will still burn through a cotton jumpsuit like a cigarette through nylons.
		Ol Doinyo Lengai (pronounced ol doyn-yo len-guy) is Masai for "Mountain of God." It is a place of pilgrimage for Tanzania's famous pastoralists, who often make the long journey to entreat their god, Eng'ai, for the most important things in their world: rain, cattle, and children.
		Ol Doinyo Lengai's lavas break down so quickly that their age can be judged by their color.
	magma.nationalgeographic.com /ngm/0301/feature2/fulltext.html (797 words)

	Ol Doinyo Lengai
		Ol Doinyo Lengai erupted in 1966 and 1983...
		The mountain [Ol Doinyo Lengai] as it was in 1963 on our visit is no more, for in 1967 [sic] there was another major eruption, and to judge from air photographs I have seen since, it appears that our crater has been filled in by the event.
		Hundreds of villagers, who live around Oldonyo L'engai which is found within the Ngorongoro district, had to flee from their residential areas, following the massive eruption of volcano, an occurrence that is believed to be one of the fiercest, in history and surpasses even the previous record of 1966.
	www.ntz.info /gen/n00462.html (7619 words)

	Oldoinyo Lengai
		Ol Doinyo Lengai is a unique and extremely fascinating volcano that is located in the African Rift valley about 120 km NW of Arusha, Tanzania.
		As of 2006 I have climbed Ol Doinyo Lengai 11 times and have spent 104 nights camping at the summit craters.
		Ol Doinyo Lengai volcano, altitude 2886 meters (9524 feet), towers above the East African Rift Valley in northern
	www.mtsu.edu /~fbelton/lengai.html (1130 words)

	World's Coolest Lava is in Africa
		The record that Ol Doinyo Lengai holds is that it is the only volcano in the world known to have erupted carbonatite lava in historical time.
		Freshly cooled flows in the crater of Ol Doinyo Lengai are fl but soon turn white because of chemical reactions that occur as the lava absorbs water.
		It wasn't until 1960, when a geologist reached the crater of Ol Doinyo Lengai and observed active carbonatite lava flows, that the magmatic origin of carbonatites was generally accepted.
	hvo.wr.usgs.gov /volcanowatch/2003/03_04_17.html (981 words)

	nodium » Blog Archive » Ol Doinyo Lengai
		I have climbed about 50 active volcanoes in various parts of the world, but Ol Doinyo Lengai has captured my interest like no other volcano ever has.
		As of 2005 I have climbed Ol Doinyo Lengai 10 times and have spent 100 nights camping at the summit craters.
		Oldoinyo Lengai is the only volcano in the world that erupts natrocarbonatite lava.
	www.nodium.com /articles/357_oldoinyo-lengai (351 words)

	index
		In 2004, Lengai is still remote, but it has become famous among geologists and volcanophiles as the world's most unusual volcano, due to its unique natrocarbonatite lava.
		I met Fred Belton at Lake Natron on June 29, and spoke with him subsequently in the crater of Ol Doinyo Lengai the morning of June 30.
		June 29: We arrived in the crater of Lengai in stormy conditions, strong wind and blowing dust.
	www.geocities.com /fbelton3555 (987 words)

	Oldoinyo Lengai (Site not responding. Last check: 2007-11-03)
		Oldoinyo Lengai is the volcano on the right; to the left is Kerimasi, an older volcano also in the Rift Valley floor.
		Oldoinyo Lengai is a volcano in the Eastern Rift Valley, North Tanzania.
		Oldoinyo Lengai is of particular interest to geologists because it is the world's only active volcano that erupts natrocarbonatite lava.
	it.stlawu.edu /~cnya (238 words)

	Ol Doinyo Lengai volcano, Tanzania, main page
		Ol Doinyo Lengai means "Mountain of God" in Massai language.
		It is a steep around 2900 m high stratovolcano located in a section of the East-African rift valley in northern Tanzania, near the Ngorongongo and Serengeti National parks.
		All activity was confined to two cinder cones (misleadingly called hornitos, named T56B and T58B), which showed variable activity of lava fountains and strombolian activity, interrupted by repeated and spectacular collapses of the cones themselves.
	www.decadevolcano.net /volcanoes/africa/oldoinyo_lengai/lengai.htm (332 words)

	Archived Volcano Eruption News
		At 0210 on Aug 5, 2002, part of an expedition camp in the crater of Ol Doinyo Lengai was destroyed by an eruption.
		During 4-9 Aug. 02 Lengai was in a heightened state of activity.
		Ol Doinyo Lengai is currently in an unprecedented state of high activity.
	www.volcanolive.com /news31.html (1213 words)

	Earlham College - Geology 211 - Template
		Ol Doinyo Lengai is unusual in that it is extrusive carbonatite.
		While I lived with one of these Maasai families off the base of Lengai, everyone I met stressed to me that Ol Doinyo Lengai is both a blessing and a curse.
		World-famous volcanologist Katia Krafft once called Ol Doinyo Lengai a "toy volcano" because its lava was so cool that she could take samples of it with only a spoon.
	www.earlham.edu /~castlje/web/jessicac.htm (617 words)

	Africa Safaris with Lengai Treks and Safaris Ltd
		The Lengai is located along the East African Rift Valley wall escarpment north-east of the NGORONGORO highlands.
		The last minor explosions of Lengai are reported to have been witnessed by a group of touring climbers in the beginning October 2005.
		Be prepared for sliding, stumble gating on the way,the final half of the descent is quite slippery, grabbing bits of vegetation along might help to break the momentum.
	www.lengaisafaris.com /lengai.html (811 words)

	OL DOINYO LENGAI - THE MOUNTAIN OF GOD
		Lengai expeditions are ideal for adventurous geologists, photographers and avid "volcano chasers" who want to fully experience Earth's most unusual volcano.
		Participants should bear in mind that the active crater of Ol Doinyo Lengai is extremely hazardous and that safety cannot be assured.
		For detailed information about Lengai expeditions, please SEND AN EMAIL.
	oldoinyolengai.org (163 words)

	Ol Doinyo Lengai
		Ol Doinyo Lengai means "Mountain of God" in the language of the Maasai people.
		Ol Doinyo Lengai is the only active volcano I've ever climbed, and at the top we suddenly found ourselves in this bizarre lunarscape that looked like the product of one of Salvador Dali's nightmares.
		Ol Doinyo Lengai is north of the Ngorongoro Conservation Area and not included in any National Park, so there are no fees to go there if you're a resident of Tanzania, which all of us were.
	www.astro.wisc.edu /~povich/tz/writings/oldoinyolengai.html (1270 words)

	Ol Doinyo Lengai Volcano, Tanzania - John Seach (Site not responding. Last check: 2007-11-03)
		Ol Doinyo Lengai Volcano, Tanzania - John Seach
		The cone is composed of ash and reaches a maximum slope of 42 deg.
		Ol Doinyo Lengai Volcano has the coolest lava of any volcano.
	www.volcanolive.com /lengai.html (75 words)

	Strangest Volcano on Earth @ National Geographic Magazine (Site not responding. Last check: 2007-11-03)
		Though Ol Doinyo Lengai's fresh natrocarbonatite lavas—which erupt at around 1,000 degrees Fahrenheit (500 degrees Celsius)—are roughly half the temperature of more common basalt lavas, the spattering drops of molten rock will still burn through a cotton jumpsuit like a cigarette through nylons.
		Unlike other volcanoes, which spew silica-rich basalts, Ol Doinyo Lengai is the only active volcano on Earth that erupts with a carbonatite, a type of igneous rock rich in carbonates such as calcite and dolomite.
		Ol Doinyo Lengai is unusual not only because its volcanic activity brings a carbonatite to the surface, but also because the type of carbonatite is special.
	magma.nationalgeographic.com /ngm/0301/feature2/index.html (607 words)

	The Word: Ol Doinyo Lengai - earth - 17 December 2005 - New Scientist
		Mount Vesuvius in Italy and Mount St Helens in Washington state are hardly giants, but for the scale and destructive power of their eruptions they are hard to beat.
		Ol Doinyo Lengai, some 120 kilometres north-west of Arusha, Tanzania, in east Africa's Rift Valley can pack a punch too.
		Ol Doinyo Lengai (the name translates as Mountain of God) is the only volcano on Earth with alkali-rich carbonatite lava.
	www.newscientist.com /article/mg18825301.700.html (307 words)

	SwissEduc: Stromboli Online - Ol Doinyo Lengai
		Although during the dry season some tourists reach the summit for one or two hours every week, the only way to see varied magmatic activity is to spend several days in the crater.
		Anticrepuscolar rays crown the phantastic landscape of Lengai's crater.
		On the N rim, the lava flow from T49E descends the slopes of Lengai in spectacular falls for hundreds of meters.
	www.swisseduc.ch /stromboli/perm/lengai/paroxday-en.html (537 words)

	Contribute to Ol Doinyo Lengai Research!
		Since Ol Doinyo Lengai is the only volcano in the world that erupts natrocarbonatite lavas, he would like to obtain specimens from the crater as often as possible, since the lava can change its composition over time.
		Mitchell would greatly appreciate receiving any specimens of Lengai’s lava from you if you are willing to collect it from the crater and post it to Canada once you have returned home.
		Photographs: Many people who climb Ol Doinyo Lengai on a day-trip do not go all the way to the true summit, but if you do, please make a photo or two of the crater from the summit.
	www.mtsu.edu /~fbelton/lengairesearch.html (748 words)

	Oldoinyo Lengai , O. Lengai , Tanzania , volcano / www.v-e-i.de / Volcano Expeditions International / VEI
		Figure A. Sketch of the Ol Doinyo Lengai crater looking S from the N rim, 17 August 1996.
		He managed to slide down the steep slopes of O. Lengai on his hands and right foot for most of the steep upper track, but was finally carried by a seat-construction and by four strong porters on their shoulders the rest of the way down.
		But most difficult is the problem of rescue at Lengai like our example shows, though even the danger of the mountain itself and the weather should be taken very seriously.
	www.v-e-i.de /english/volcanoes/oldoinyo_lengai.html (8423 words)

	Ol Doinyo Lengai (Site not responding. Last check: 2007-11-03)
		Tanzania's only active volcano is Ol Doinyo Lengai, whose name means "Mountain of God" in the Maasai language.
		Here the 9,480-ft (2900-m) conical mountain is reflected in a rivulet of Lake Natron, a large soda lake that was in the process of shrinking due to the onset of the dry season.
		The white stripe spilling off of the peak is ash, not snow.
	www.astro.wisc.edu /~povich/tz/images/oldoinyolengai.html (63 words)

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