Abstract
Summary Phitsanulok Basin is the largest of Cenozoic intracratonic extensional basins of the onshore Thailand which has an aerial extent in the order of 6000 km2. The basin is situated in the structural complex regime and controlled on the sedimentation in the basin. The basin is bounded by the Uttaradit oblique extensional fault zone to the north and bounded by Mae Ping dextral strike-slip in the south. This basin is N-S trending half graben bounded by the Western Boundary Fault, which controls subsidence rate in the north part of the Phitsanulok Basin. The basin contains Tertiary sedimentary rocks up to 8000 m thick. The basin was rifted during Late Oligocene and continued rifting which has high sediments supply from the north-east part of the basin. While the southern part, open lake deposited with fluvio-deltaic in some area. Understanding of the sedimentation process, the structure is most important controlling the sedimentation results associated with a change in climate.
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