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Tombel Graben
"Young cinder cones and maars dot the low-lying Tombel Graben (also referred to as the Tombel Plain) between Mount Cameroon and Mount Manengouba. Activity in the 10-20 km wide graben began with the emission of large lava flows over a basement of Precambrian metamorphic rocks and Cretaceous sandstones and concluded with explosive activity forming numerous cinder cones. The 800 sq km Tombel Graben volcanic field erupted basanitic, basaltic, and trachybasaltic rocks and contains three large lake-filled maars, including Barombi Mbo, a compound maar near the town of Kumba. Legends record an eruption of Le Djungo (also known as Mont PelĂ©) that destroyed a village, consistent with its youthful, unvegetated morphology."  -Smithsonian Volcano Archive
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