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    초록·키워드

    In the north-central part of the Gyeongsang basin, near Cheongsong, the basal part of the Yucheon Group is represented by the Weoloedong Conglomerate that unconformably deposited on the erosion surface of the Hayang Group. The top unit, of the Hayang Group is absent here due probably to erosional denudation prior to the deposition of the Conglomerate. In the west central part of the Gyeongsang basin, a local scene of an angular unconformity is seen in the Mt. Geumseong where the upper part of the east-tilted Hayang Group was truncated upon which the basal basalt of the Yucheon Group was deposited with an angular discordance of about 30 degrees. A regional angular discordance between the Yucheon Group and the low-lying formations of the Hayang and the Sindong Groups occurs in the southern peripheral part of the Gyeongsang basin along the southern coast of the Korean peninsula. The Yucheon Group overlies toward the west progressively lower formations until upon the basement below the Sindong Group. In some areas, however, the unconformity at the base is obscure while in others not adequately studied. The crustal movement that caused the unconformity at the base of the Yucheon Group is here called the Yucheon Disturbance

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      UCI(KEPA) : I410-ECN-0101-2012-450-004399229