Structural Geometry of a Regional-scale Overturned Fold in the Daecheong Island, Central-western Korean Peninsula

This study reports the structural geometry and folding mechanism of a regional-scale overturned fold in the Daecheong Island, centralwestern part of the Korean Peninsula.Based on low-hemisphere stereographic and down-plunge projections using data from a detailed field survey, we classify the regional-scale fold as an open overturned fold shallowly plunging toward NE.The asymmetric and symmetric parasitic folds in the limb and hinge zones indicate layer-parallel shortening prior to flexural-flow folding.Fold dating must be required to decipher the orogenic process causing the regional-scale overturned fold in the Daecheong Island.