South of Lake Natron in the eastern rift valley of North Tanzania, lies Mount Oldonyo Lengai (locally regarded as the sacred Mountain of God in the Maa Language), an active volcano. At 2878meters, Mt. Lengai is the only known volcano in the world that sometimes erupts natrocarbonatite lava, a highly fluid lava that contains almost no silicon. Natrocarbonatite lava (most fluid lava) is also much cooler than other lavas. During the day most of this lava flows look like fluid black oil. Some feel the lava flows resemble mud like-flows. Natrocarbonatite lava turns white when in contact with moisture. During rainy periods, the lava turns white almost immediately whilst this whitening takes longer during the dry periods.
Mount Oldonyo Lengai also has phases of explosive activity during which the composition of the lava may contain much more silicate material. With this type of eruption, initial phases of the eruption may include strong lava fountains but usually there is no fluid lava and ash eruptions accompanied by ejection of rocks and explosions occurs. The two most recent eruptions of this type occurred during 1966-1967 and 2007-2008. Almost without fail, about every seven years Lengai erupts and plumes of smoke billow out of the crater. At other times it is possible to walk down into the crater, almost to the edge of the molten lava flows.
Views in the north from its summit crater lies the hot barren salt flats of Lake Natron stretch into the distance, beyond lies the Kenyan border. The day temperatures by the lake often exceed 40°C and a few animals survive here with the flamingo making its home here as breeding grounds, nesting on the salty surface on upraised mounds. The view on the east is dominated by Mt.Kilimanjaro and to the west the forested escarpments and hills comprising the western slopes of the Great African Rift Valley.
To the south stretches the Crater Highlands, Ngorongoro being one of the prime wildlife conservation areas in Africa.
The ascent of Oldonyo Lengai is demanding on account of the day time heat, lack of water, steep and unstable slopes of ash and crumbly rocks. An early start is recommended and the best approach is from the west where the morning sun can be avoided for a while
3 DAYS OLDONYO LENGAI ITERNARARY
Transport to the parks and back, accommodation, park entry fee, camping fees, tents, sleeping bags, mattresses, food, cook, driver/guide,and transfers according to itinerary.
WHAT TO WEAR
- Sun hat
- head torch
- buff or lightweight neck gaiter (for keeping out dust)
- rain shell
- light fleece
- long sleeve t shirt x 2
- hiking trousers (zip off style are recommended so you have shorts too)
- waterproof trousers
- socks x 3 pairs
- hiking shoes preferably with some decent ankle support
- teva or flip flops for in camp
- walking poles
- gaiters for those that have low cut hiking shoes
- water bottles x 3 enough to hold 3 Liters
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