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In page Sulawesi:

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The Bone Basin lies between the eastern and western arms of Sulawesi. According to recent studies, the basin has been opened up due to extensional forces.[1] The basin is bounded by normal faults on each side of the basin. Each side of the basin is surrounded by uplifted basement rock with young sediments found in the middle.[citation needed] The past geological history has allowed for a large accumulation of carbonates which could lead to a higher potential of oil and gas occurrences. However, the faults present in the basin makes it a very complicated system.[citation needed]