More informationĪbout viewing, downloading, and printing report files can be found at the common download problems FAQ. Download the latest version of Adobe Reader, free of charge. PDF documents opened from yourīrowser may not display or print as intended. The documents to your computer and open them with Adobe Reader. For best results viewing and printing PDF documents, it is recommended that you download Part or all of this report is presented in Portable Document Format GIS files Metadata Chemical AnalysesĪrusha Region Lake Natron Oldonyo Lengai Volcano Geologic map of Oldonyo Lengai (Oldoinyo Lengai) Volcano and surroundings, Arusha Region, United Republic of TanzaniaĬascades Volcano Observatory, Volcano Science Center The database includes layers for hypsography (topography), hydrography, and infrastructure such as roads and trails. The GIS database is in a Transverse Mercator projection, zone 36, New (1960) Arc datum. This mosaic of photographs of the southern portion of Lake Natron shows the largest open lagoon area, and island mud flat, and a large area of pink salt crust. Those who prefer the convenience and access offered by Geographic Information Systems (GIS) may download an electronic database, suitable for most GIS software applications. Because of the unique biodiversity, Tanzania named the Lake Natron Basin to the Ramsar List of Wetlands of International Importance on 4 July 2001. Six new radiometric ages, by the 40Ar/ 39Ar method, and 48 new geochemical analyses from Oldonyo Lengai and surrounding volcanic features deepen our understanding of the area. It is here where Oldonyo Lengai, Tanzania’s most active volcano of the past several thousand years, built its edifice. Exposed strata provide a history of volcanism, sedimentation, and faulting that spans 2 million years. The southernmost Lake Natron basin is located along the East African rift zone in northern Tanzania. In this way questions are raised and challenges proposed to future workers. Its goal is to place the new findings into the framework of previous investigations while highlighting gaps in knowledge. 2 The southern half of Lake Natron (top). 1 The lake is within the Lake Natron Basin, a Ramsar Site wetland of international significance. It is in the Gregory Rift, which is the eastern branch of the East African Rift. The map sheet can be downloaded in pdf format for online viewing or ready to print (48 inches by 36 inches).Ī 65-page explanatory pamphlet describes the geologic history of the area. Lake Natron is a salt or alkaline lake located in north Ngorongoro District of Arusha Region in Tanzania. Lake Natron in Tanzania is one of the most serene lakes in Africa, but its also the source of some of the most phantasmagorical photographs ever captured images that look as though living. The geology of Oldonyo Lengai volcano and the southernmost Lake Natron basin, Tanzania, is presented on this geologic map at scale 1:50,000.
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