The Systemization of Narration Form Type by Motion Graphics Narrator

이병주,

doi:10.17280/jdd.2011.11.2.005

Cited by 1 publication

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“…. 그러나 옥천습곡대 서남부지역에 분포하는 백악기 분지들은 대체로 중국방향과 일치하며 해남-진도, 나주-무안-신안, 함평-영광지역에 소규모의 독 립적인 퇴적분지를 형성하고 있다 (박노영과 김정환, 1972;이병주 외, 1999a;1999b;Kim et al, 2003). 이 분지들의 퇴적층에는 공룡뼈, 공룡알, 공룡발자국, 익룡뼈, 식물화석 및 무척추동물의 생물교란작용에 의한 생흔화석 등 다양한 종류의 화석들이 산출되고 있어, 지층의 시대 구분과 대비는 물론 퇴적물이 퇴 적될 당시의 고환경과 고생태 연구에 대한 학술적인 가치가 높다 (백인성과 천종화, 1993; 양승영, 2005; 양승영 외, 2006; 윤철수와 양승영, 1997; 윤철수 외, 2004; 이융남, 2004; 이융남 외, 2007; 임성규 외, 2006; 허민 외, 1999, 2001, 2003, 2006; 허민과 황 구근, 2004; 황구근 외, 2002, 2004; 김정빈, 2008 반상안산암은 담회색을 띠고, 반자형에서 자형의 사장석과 휘석 반정을 함유하며 석기는 미립의 사정 석, 휘석, 녹니석, 불투명광물로 구성된다 (Fig.…”

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K-Ar Ages of Dinosaur Egg Nest found in Cretaceous Formation of Aphaedo, Jeollanam-do, Korea

Rhee¹,

Kim²,

Kim³

et al. 2012

Journal of the Korean earth science society

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이찬영 1 ·김보성 2 ·김명지 3 ·김정빈 4, * 1 전남과학고등학교, 520-824, 전라남도 나주시 금천면 오강길 33 2 목포자연사박물관, 530-830, 전라남도 목포시 남농로 135 3 대성여자고등학교, 503-330, 광주광역시 남구 서문대로 663번길 37 4 순천대학교 물리교육과, 540-950, 전라남도 순천시 중앙로 255Abstract: In September 2009, a perfectly preserved fossil of a dinosaur egg nest was discovered in the Cretaceous formations of the Aphaedo area in Shinan, Jeollanam-do, South Korea. In order to estimate the age of dinosaur eggshells and the depositional age of the Cretaceous sediments in Aphaedo area, a whole-rock K-Ar dating was carried out on volcanic pebbles showing a sedimentary structure contemporaneous with the Aphaedo strata, acidic tuffs overlaying the strata conformably, and acidic dike rocks intrude to both of them. Volcanic rocks observed in the strata are 3-20 cm in diameter as pebbles found in lenticular conglomerate and pebble bearing mudstone strata. K-Ar whole-rock dating was performed on six different volcanic pebbles which show a sedimentary structure contemporaneous with the dinosaur egg nest contained in the strata, and all samples show Late Cretaceous ages: Cenomanian (97.6±1.9 Ma), Coniacian (87.6±1.7 Ma), Santonian (84.5±1.7 Ma) or Campanian (82.5±1.6, 77.3±1.5, 75.7±1.5 Ma). The K-Ar whole-rock age of acidic tuffs overlaying the Cretaceous formation conformably was estimated to be Campanian (79.2±1.6 or 77.3±1.5 Ma), when the dating was carried out under the same conditions. The acidic dike intruding both Cretaceous formation and acidic tuff showed a K-Ar whole-rock age of 70.9±1.4 Ma (Campanian). Therefore, the depositional age of the Cretaceous formation in the Aphaedo area and the time when dinosaurs lived in the study area are considered to be 77-83 Ma. Such results indicate that the ages of dinosaur eggshells from Aphaedo area can be correlated with the ages of the Seonso Formation (81 Ma) with dinosaur egg nest fossils and the Uhangri Formation (79-81 Ma) with dinosaur, pterosaur and web-footed bird tracks.

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