Age and Stratification of Dinosaur Eggs and Clutches from Seonso Formation, South Korea
(주)코리아스칼라
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- 2016.04.02
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- 2008.09
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서지정보
ㆍ발행기관 : 한국지구과학회
ㆍ수록지정보 : 한국지구과학회지 / 29권 / 5호
ㆍ저자명 : Kim, Cheong-Bin, Kim, Jeong-Min, Huh, Min
영어 초록
The absolute age of lapilli tuff in sedimentary formation that contains dinosaur fossils in the Boseong area, Korea was determined radiometrically against volcanic rocks below and above the fossil-bearing horizons. The sanidine in the lapilli tuff below the fossil-bearing horizon (Seonso formation) has an 40Ar-39Ar age of 81.l±1.4Ma. The Pilbong tuff above Seonso formation has an 40Ar-39Ar age of 81.0±2.4Ma. An andesite dyke intruding all sedimentary units yields an 40Ar-39Ar age of 42.4±2.5Ma. Thus 81 Ma age can be regarded as the best estimate for the age of the Seonso Formation and the associated the dinosaur eggs. This age correlates well with dinosaur fossil finds in the Haenam and Koseong regions of Korea. The occurrence of dinosaur eggs and clutches attests to the existence of dinosaurs in southern Korea at least inCampanian times.
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