Earth Science (Chikyu Kagaku)
Online ISSN : 2189-7212
Print ISSN : 0366-6611
Paleozoic and Mesozoic Systems in the Tamba Belt (Part 5)
Perimian and Triassic Conodont Fossils in the Northwestern Hills of Kyoto City
TAMBA BELT RESEARCH GROUP
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1979 Volume 33 Issue 5 Pages 247-254a

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Abstract
In the former report (TAMBA BELT RESEARCH GROUP, 1979), the lithofacies and geologic structure of the Paleozoic and Mesozoic formations (Tamba Group) of the Northwestern hills of Kyoto City had been described. In this report, occurrences of conodont fossils of Permian and Triassic age in this region are treated. Middle to Upper Triassic conodont fossils are found abundantly, namely, Gladigondolella tethydis, Paragondolella polygnathiformis, Metapolygnathus abneptis, M. bidentatus etc.. In some region, these Triassic conodont fossils occurred in succession with stratigraphic order, and repeatedly by faults. Permian conodont fossils are found near the occurrence of fusuline fossils, namely, Sweetognathus whitei, Neogondolella spp., Neostreptognathodus sp. indet., etc.. The Permian and Triassic formations are noticed in conformable relation. Correlation between the formations of the Maizuru and Tamba Belts is discussed. The Triassic formations of the Maizuru Belt are represented by neritic shelf facies. On the contraly, the Triassic formations of the Tamba Belt are eugeosynclinal facies, and show continuation of the Honshu geosyncline to the late Triassic Period. Lithofacies of the Upper Triassic formation shows remarkable contrast between areas in this region. Slate-shale and chert facies and coarser clastic facies are separated by Schalstein occurrece, and this relation may be suggests some topographic nature in the sedimantary basin.
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© 1979 The Association for the Geological Collaboration in Japan
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