• Title/Summary/Keyword: 공룡화석

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NEWS&TOPICS 해외

  • Min, Yeong-Gi
    • The Science & Technology
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    • no.3 s.406
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    • pp.8-9
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    • 2003
  • 4개의 날개 가진 공룡화석 발견/ 목성탐사선 갈릴레오호 임무 마감/ 돼지심장 양에 이식 성공/ 음향 냉장고 만든다/ 질소비료가 이산화탄소 증가의 주범/ 우주의 초창기 진화 과정 밝혀져/ 화성에 쌍둥이 로봇 발사 예정/ 지구에서 가장 먼 행성 발견

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The Link between Birds and Dinosaurs: Aves Evolved from Dinosaurs (새와 공룡의 연계성: 조류는 공룡으로부터 진화)

  • Moon, Yang Soo
    • Korean Journal of Poultry Science
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    • v.49 no.3
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    • pp.167-180
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    • 2022
  • Aves including chickens are currently one of the most representative vertebrates on the planet. More than 10,000 bird species are distributed among various regions around the world. Dinosaurs, which evolved from archosaurs, were once assumed to have gone extinct during the Cretaceous-Paleozoic extinction period. Since the mid-1990s, abundant dinosaur fossils have been found in China and various other parts of the world. Research articles on phylogenetic, evolutionary, and genomic studies of fossil taxa show that birds are living theropod dinosaurs. This review describes the link between birds and dinosaurs based on studies of their skeletal structures, feathers, respiratory organs, chromosomes, and metabolism. Birds are the only theropod dinosaurs that survived the mass extinction 66 million years ago. Dinosaurs did not go extinct and we are still living in the age of the dinosaurs.

지질과학의 세계

  • Jang, Sun-Geun
    • The Science & Technology
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    • v.33 no.1 s.368
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    • pp.33-33
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    • 2000
  • 지질과학의 연구대상은 바위이며 그 속에 있는 화석으로 고생물들의 변화를 추적한다. 멸종될 공룡의 골격과 배설물로 공룡이 살아있던 환경을 알아낸다. 이제 인간의 지혜는 달을 비롯하여 화성ㆍ금성 등 행성을 탐사하는 시대로 접어들어 지질학자들은 이 행성의 연구로 수십억년 변천해온 우주의 신비도 벗기게 될 것이다.

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Bird Tracks from the Gyeongsang Basin of the Korean Peninsula: A Paradise of Mesozoic Birds (중생대 새의 낙원 한반도 경상 분지에서 산출되는 새 발자국 화석)

  • Kim, Jeong Yul;Kim, Kyung Soo;Lim, Jong Deock
    • Korean Journal of Heritage: History & Science
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    • v.42 no.1
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    • pp.40-61
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    • 2009
  • The Cretaceous Gyeongsang Supergroup, composed of clastic sediments mostly deposited in the lacustrine and fluvial environment, is widely distributed in the southern part of the Korean Peninsula. Diverse fossils of plants, molluscs, insects, footprints of dinosaurs, pterosaurs and birds, and eggs, bones, and teeth of dinosaurs have been found from the Gyeongsang Supergroup. New types of dinosaur, pterosaur, and bird tracks recently discovered from the Gyeongsang Supergroup attract great attention from the world. Several tracksites of dinosaurs and birds were designated as Natural Monument and nationally conserved, and many efforts have given to them for nomination of UNESCO World Heritage. Bird tracks from the Gyeonsang Supergroup are Koreanaornis hamanensis, Jindongornipes kimi, Goseongornipes markjonesi, Ignotornis yangi, Uhangrichnus chuni, and Hwangsanipes choughi, which correspond approximately one third of Mesozoic bird tracks recorded from the world. The Gyeongsang Basin of the Korean Peninsula yields world most diverse bird tracks which may be called a paradise of Mesozoic birds and they are important natural heritage providing significant information about evolution and paleogeographic distribution of birds.

Application of 3D Digital Documentation to Natural Monument Fossil Site (천연기념물 화석산지의 3차원 디지털 기술 적용)

  • Kong, Dal-Yong;Lim, Jong-Deock;Wohn, Kwang-Yeon;Ahn, Jae-Hong;Kim, Kyung-Soo
    • The Journal of the Korea Contents Association
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    • v.11 no.11
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    • pp.492-502
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    • 2011
  • 20 fossil sites of numerous fossil sites in Korea have been designated as Natural Monument for protection and conservation. Many of the sites which is located at the coastal area have been gradually disfigured by natural weathering, erosion and human activity. Thus the conservation of the original form and the documentation for the original figure are necessary. In this study, we applied 3D digital documentation to Natural Monument No. 394, Haenam Uhangri dinosaur, pterosaur, and bird footprint fossil site, for maintaining the original form of the dinosaur footprints. We were able to obtain the 3D digital data on two dinosaur footprint sites, a high resolution distributional map, and more accurate digital data of the dinosaur footprints applied the rendering method by ambient occlusion. 3D digital data on the dinosaur footprints is worth for the conservation and research data, moreover content for applying to the various fields such as to make 3D brochure, interactive contents, and so on.

Age of the volcanism and deposition determined from the Cretaceous strata of the islands of Yeosu-si (여수시 도서지역의 백악기층에 나타나는 화성활동 및 퇴적시기)

  • Park, Kye-Hun;Paik, In-Sung;Huh, Min
    • The Journal of the Petrological Society of Korea
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    • v.12 no.2
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    • pp.70-78
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    • 2003
  • Sado, Chudo, Mokdo, Nangdo, and Jeokgeumdo are the islands which belong to Hwajeong-myeon, Yeosu-si, Jeollanam-do and there are various kinds of volcanic rocks, volcaniclastic sedimentary rocks, and dinosaur-fossil bearing sedimentary rocks on these islands. This study is designed to constrain geologic ages of these volcanic and sedimentary rocks. K-Ar ages of these rocks indicate that the volcanism of this area occurred mainly during the period of 91.8 ${\pm}$ 3.5∼65.5 ${\pm}$ 1.3(l$\sigma$) Ma. Deposition ages of the sedimentary rocks were bracketed based on the ages of the volcanic rocks and observed field relationship between sedimentary and volcanic rocks. The oldest sedimentary deposit of the area is the volcanic pebble bearing conglomerate of the Jeokgeumdo and its deposition age is ca. 81 Ma or less. The deposition age of the Chudo shale, which belongs to stratigraphically upper sequence and bears many dinosaur footprints, is at least ca. 77 Ma. Conglomerate of the Mokdo was deposited at ca. 72∼70 Ma. The deposition age of the dinosaur fossil deposit of the Sado is at least ca. 65 Ma. All the investigated volcanic and sedimentary rocks of the Yeosu islands were formed during the late Cretaceous and dinosaurs lived until the latest Cretaceous in this area.

K-Ar Ages of Cretaceous Fossil Sites, Seoyuri, Hwasun, Southern Korea (화순 서유리의 백악기 화석산지에 대한 K-Ar 연대)

  • Kim, Cheong Bin;Kang, Seong Seung
    • Journal of the Korean earth science society
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    • v.33 no.7
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    • pp.618-626
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    • 2012
  • The Cretaceous fossil sites of Seoyuri in Hwasun was designated as the Korean Natural Monument No. 487 in November 2007. It provides important resources for paleoenvironmental studies, including theropod trackways, plant fossils, mudcracks, ripple marks, and horizontal bedding. The Cretaceous sedimentary strata contain a wide variety of volcanic pebbles, 5-40 cm in diameter in the lower portion and are overlain by the Late Cretaceous Hwasun andesite. Whole rock absolute K-Ar age determinations were performed on six volcanic pebbles from the Cretaceous sedimentary strata and on two samples from the overlaying Hwasun andesite. These ages indicate that the rocks belong to the period between the Turonian of the late Cretaceous (91-70 Ma) and the Pliocene age of the early Cenozoic ($63.4{\pm}1.2$ and $62.1{\pm}1.2$ Ma). Thus, the K-Ar ages indicate that the maximum geological age of the dinosaur track-bearing sedimentary deposits is about ca. 70 Ma. Therefore, it suggests that the age is comparable to the formation ages of the dinosaur footprints-bearing deposits in Sado area of Yeosu (71-66Ma).