The Yemi Breccia has been reported as a separate formation near Yemi area, Kangwondo. This formation overlies the Maggot Formation of the Joseon Supergroup unconformably, and is overlain by the Goseong Shale conformably. Based on the field observation and textural examination of the Yemi Breccia, the breccia beds are interpreted as soluton-collapse breccia beds, which were formed by the dissolution of the pre-existing evaporites. The evaporites were precipitated during the deposition of the upper part of the Maggot Formation. Therefore, the Yemi Breccia should not be regarded as a separate formation, instead, it should be considered to be a upper part of the Maggot Formation. This implies that the overlying Goseong Shale and Goseong Limestone can be correlated with the Jigunsan and Duwibong Formtions, respectively.