岡山大学 地球科学研究報告
Published by Okayama University Earth Science Reports Editorial Committee

上部三畳系成羽層群における 日本最古の化石林の発見 ―堆積環境復元および古植生復元における意義―

湯川 弘一 岡山大学大学院自然科学研究科
寺田 和雄 福井県立恐竜博物館
孫 革 遼寧古生物博物館
鈴木 茂之 岡山大学大学院自然科学研究科
抄録
Erect fossil stumps were found from the outcrop of the Upper Triassic Hinabata Formation, the uppermost part of the Nariwa Group at Hinabata, Nariwa-cho,Takahashi City, Okayama Prefecture, SW Japan. They are evidence of the oldest fossil forest in Japan. The Upper Triassic Nariwa Group is mostly composed of non-marine deposits except the marine Jito Formation and characterized by the abundance in plant fossils. The marine Jito Formation is characterized by occurrence of Norian Monotis ochotica. On the basis of detailed observation of the occurrence of erect fossil stumps, as well as sedimentary facies of fossil-bearing unit, the fossil forest was interpreted to have grown on the top of the natural-levee units. One of the erect fossil stumps was identified as Xenoxylon sp.
キーワード
erect fossil stump
fossil forest
Nariwa Group
Upper Triassic
Xenoxylon
ISSN
1340-7414
NCID
AN10506284
NAID