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A topographical and geological map of southern Sumatra, over four sheets. Areas of igneous and sedimentary rock, coal, fossils, petroleum, active volcanoes and hot springs are marked, along with mountains, rivers and marshland, roads and settlements.

A geological map, spread over eight sheets, showing the types of rock and minerals found in the Oembilien coalfield, in the Padang Highlands on Sumatra’s west coast. There are also additional geological profiles.