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Stamp Card produced by Ottmar Zeihar - German East Africa

Stamp Card produced by Ottmar Zeihar - German East Africa (a German colony in the African Great Lakes region, which included what are now Burundi, Rwanda, and the mainland part of present Tanzania). These cards enabled collectors to see stamps which they were unable to obtain, or afford. There is a complete set of 180 cards, some of the smaller countries had a very low printing run and are hence very rare. Used Zeiher cards are very hard to find as the embossed stamp design was not approved by postal authorities as it confused the function of the proper stamps! Date: circa 1904

© Mary Evans / Grenville Collins Postcard Collection

20062747

TANZANIA West Great Lakes Region Refugees making gambions to prevent water erosion. Base of structure is stone filled wire cages covered with earth.Refugees from the Congo and Rwanda fleeing conflict in Burundi Zaire

© eye ubiquitous / hutchison

Africa, Agriculture, People, Work

Ol Doinyo Langai in Tanzania

Ol Doinyo Langai in Tanzania is the only volcano in the world that erupts natrocarbonatite lava, which is rich in calcium, sodium, and potassium, but low in silica (silicon dioxide). The lava of Ol Doinyo Lengai is extremely cool (500a??600A? C, compared to 1, 160A? C for typical basaltic lava) and relatively fluid. Ol Doinyo Lengai alternates between eruptions of liquid lava that form lava lakes and fountains (called effusive eruptions) and explosive eruptions that build large cinder and ash cones.
In September 2007, explosive eruptions began on Ol Doinyo Lengai, spewing ash thousands of meters into the air and covering the surrounding landscape. Explosive eruptions continued into 2008, building a cone over 100 meters (330 feet) high that enclosed a steep-walled crater. The new cone and crater are clearly visible in the center of this image acquired on September 12, 2009. The dark spot in the crater may be fresh lava erupted from a new volcanic vent. Gray ash covers the volcano and much of the surrounding landscape

© Stocktrek Images