Fossil bivalve assemblages and depositional environments of the upper part of the Cretaceous Yezo Supergroup, Kotanbetsu-Haboro area, Hokkaido, Japan
スポンサーリンク
概要
- 論文の詳細を見る
The upper part of the Cretaceous Upper Yezo Group, which is distributed throughout the Kotanbetsu-Haboro area, Hokkaido, north Japan, contains a regressive sequence from outer shelf to shoreface sediments and is sedimentologically divided, from top to bottom, into four facies : Facies 1 (hummocky cross-stratified sandstone), Facies 2 (bioturbated fine-grained sandstone), Facies 3 (intensely bioturbated sandy mudstone), and Facies 4 (massive mudstone). The strata commonly yield bivalve fossils. With the exception of inoceramids, the bivalves are classified into three fossil assemblages : the Parvamussium-Nucula, Thetis-Nucula, and Nucula-Heterotrigonia assemblage, respectively. These assemblages are mostly autochthonous and include remarkable benthic fauna such as Propeamussiidae, Lucinacea, Nuculacea, and Telli-nidae that were adapted to live under oxygen-poor conditions. In particular, the bivalves of Facies 3 inhabited favorable surroundings in terms of a rich supply of organic material and a suitable depositional environment.
- 日本古生物学会の論文
- 2007-09-30
著者
-
Maeda Haruyoshi
Department Of Earth And Planetary Sciences Graduate School Of Science Kyoto University
-
TSUJINO YASUYUKI
Tokushima Prefectural Museum
関連論文
- First discovery of Pravitoceras sigmoidale Yabe from the Yezo Supergroup in Hokkaido, Japan
- Ontogenetic shell development of a Cretaceous desmoceratine ammonoid "Tragodesmoceroides subcostatus" Matsumoto, 1942 from Hokkaido, Japan
- Significance of autochthonous fossil barnacles from the Miocene Natori Group at the Moniwa-Goishi area, northeast Japan
- Taphonomy of large Canadoceras (ammonoid) shells in the Upper Cretaceous Series in South Sakhalin, Russia
- Taxonomic evaluation of various morphological characters in the Late Cretaceous desmoceratine polyphyletic genus "Damesites" from the Yezo Group in Hokkaido and Sakhalin
- Stratigraphy and fossil bivalve assemblages of the mid-Cretaceous Goshoura Group, southwest Japan
- Discovery of mid-Cretaceous ammonoids from the Aridagawa area, Wakayama, southwest Japan
- Fossil bivalve assemblages and depositional environments of the upper part of the Cretaceous Yezo Supergroup, Kotanbetsu-Haboro area, Hokkaido, Japan
- Significance of the direct correlation of ammonite and radiolarian zones in the Izumi Group for integrated biostratigraphy of Late Cretaceous NW paleo-Pacific region
- Estimation of allometric shell growth by fragmentary specimens of Baculites tanakae Matsumoto and Obata (a Late Cretaceous heteromorph ammonoid)
- Holocene ostracods from the borehole core at Oppama Park, Yokosuka City, Kanagawa Prefecture, central Japan : Paleoenvironmental analysis and the discovery of a fossil ostracod with three-dimensionally preserved soft parts
- Early Permian ostracods from Mugi County, Gifu Prefecture, central Japan
- A new Early Devonian leperditicopid arthropod : Sinoleperditia hamadai sp. nov., from Fukuji District, Gifu Prefecture, central Japan