著者

宮田 和周 中田 健太郎 柴田 正輝 長田 充弘 永野 裕二 大藤 茂 中山 健太朗 安里 開士 中谷 大輔 小平 将大

出版者

一般社団法人 日本地質学会

雑誌

地質学雑誌 (ISSN:00167630)

巻号頁・発行日

vol.129, no.1, pp.239-254, 2023-04-01 (Released:2023-03-31)

参考文献数

100

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長崎半島東海岸に露出する上部白亜系“北浦層”を長崎北浦層と改定した.本層は下部の赤崎ノ鼻砂岩泥岩部層と上部の座頭浜礫質砂岩泥岩部層に二分でき,両部層は断層で接する.赤崎ノ鼻砂岩泥岩部層から産した2種のアンモナイト類(Polyptychoceras obataiとcf. Phylloceras sp.)と1種のイノセラムス類(Platyceramus japonicus),座頭浜礫質砂岩泥岩部層から産したハドロサウルス上科の鳥脚類恐竜の大腿骨化石を記載した.赤崎ノ鼻砂岩泥岩部層の軟体動物化石と砕屑性ジルコンのU-Pb年代から,長崎北浦層の時代は後期サントニアン期以降であり,おそらくカンパニアン期におよぶ.座頭浜礫質砂岩泥岩部層は岩相から長崎半島西海岸の三ツ瀬層の下部(中期カンパニアン期)に対比できる.長崎北浦層の層序は西九州の上部白亜系姫浦層群の下半部に関連すると考えられる.

著者

柴田 正輝 尤 海魯 東 洋一

出版者

日本古生物学会

雑誌

化石 (ISSN:00229202)

巻号頁・発行日

vol.101, pp.23-41, 2017-03-31 (Released:2019-04-03)

被引用文献数

1

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Researches on Japanese dinosaurs make progress dramatically in these decades, since the first dinosaur discovery in the present territory of Japan was made in 1978. Currently, Japanese dinosaur fossils have been unearthed in 16 prefectures of Japan, from Hokkaido to Kagoshima. However, all named Japanese dinosaurs, seven original genus and species, are known only from three localities of the Lower Cretaceous of the Inner Zone of Southwest Japan; Kuwajima and Kitadani formations of the Tetori Group in Ishikawa and Fukui respectively, and “lower formation” of the Sasayama Group in Hyogo. Abundant dinosaur body fossil records from these sites make it possible to compare and discuss as a dinosaur assemblage, namely “Dinosaur Fauna (hereafter DF)”, to other Early Cretaceous DFs in East and Southeast Asia. Comparisons of Shiramine (Kuwajima Fm.), Katsuyama (Kitadani Fm.) and Tamba-Sasayama (“lower formation”) DFs to Hekou, Jehol and Mazongshan DFs from China (North China Craton) and Khorat DF from Thailand (Indosina Terrane) shows interesting results on relationships among faunal changes, paleogeography and paleoenvironment; Shiramine and Jehol DFs, in the early Early Cretaceous, shares faunal similarities under a relatively cool climate, Katsuyama DF, in the middle Early Cretaceous, became to include “southern”-type dinosaurs, such as an allosauroid and a hadrosauroid under somewhat dry and temperate climate, and Tamba-Sasayama DF, in the late Early Cretaceous, includes a neoceratposian shared with Mazongshan DF and sauropod with “peg” like teeth shared with Khorat DF under seasonal dry and temperate climate. Although more sophisticated chronological, paleogeographical, and paleoenvironmental data are needed to understand their relationships, our result implies that there were possibly several routes for dinosaur divergences in the eastern margin of Asia continent, and some taxa might have been originated in the Early Cretaceous of Asia.

著者

柴田正輝

出版者

福井県立恐竜博物館

雑誌

福井県立恐竜博物館紀要

巻号頁・発行日

no.7, 2008-12