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Newly Discovered Sedimentary Facies in Cretaceous Formation Could Boost Oil Exploration.

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Characteristics of Sedimentary Facies in Cretaceous Jiufotang Formation in Songnan Area
Nansheng Qiu

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The Jiufotang Formation in the Songnan Area contains different types of sedimentary facies, such as nearshore subaqueous fan, fan delta, delta, turbidite fan, and lacustrine facies. These facies are distributed in specific zones within the basin, with nearshore subaqueous fan and fan delta facies found in steep slope areas, delta facies in gentle slope regions, and lacustrine facies in central and deep zones. The sedimentary facies transition from nearshore subaqueous fan, fan delta, or delta facies to lacustrine facies from the basin margin towards the center.