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Toh, Tarso
"The Tarso Tôh Pleistocene-to-Holocene volcanic field in the NW part of the Tibesti Range of Chad contains 150 scoria cones and two maars. Basaltic lava flows of the Tarso Tôh volcanic field fill valleys and plains over an area of 80 km in an E-W direction and 20-30 km in a N-S direction in the arid Tibesti Range north of the more well-known Tarso Toussidé volcano. The flows were erupted over a basement of Precambrian schists on the east and Paleozoic sandstones on the west. Sediments within the Begour maar were radiocarbon dated at 8300 +/- 300 years (Hagedorn and Jakel, 1969)."  -Smithsonian Volcano Archive
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