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1982 Volume 32 Pages
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Article type: Appendix
1982 Volume 32 Pages
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Article type: Index
1982 Volume 32 Pages
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1982 Volume 32 Pages
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1982 Volume 32 Pages
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Tatsuro Matsumoto, Toshitaka Yoshimatsu
Article type: Article
1982 Volume 32 Pages
1-18
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The Terasoma Formation is a part of the Shimanto Group in Wakayama Prefecture (Fig. 1). It consists of shale or shaly flysch, with pebbly mudstone or massive sandstone, in the lower member (200-350m), sandy flysch in the middle member (350m), and laminated shale or massive mudstone in the upper member (250m) (Fig. 2). The strata are intensely folded. Five localities near Terasoma (indicated with solid circles in Fig. 1), two (locs. 22 and 29) in the lower member and three (locs. 04, 05 and 01) in the upper member, have yielded a considerable number of inoceramid specimens, which are classified into six taxa as listed in Tables 1 and 2. They are described in Japanese and illustrated (Pls. 1-4). The faunule is peculiar to the Cretaceous of Japan. Inoceramus (Platyceramus) cycloides vanuxemiformis, I. (P.) rhomboides rhomboides and I. (P.) rhomboides heinei indicate that the main part of the upper member is of Santonian (probably early half of the Santonian) age, while I. (Magadiceramus) sp. nov. (?), allied to I. (M.) subquadratus, suggests that the same member could possibly comprise the uppermost Coniacian in its lower portion. Mytilodes sp. cf. M. sublabiatus or cf. M. mytilodiformis from loc. 22 and an ammonite Yubariceras aff. kanei (Jones) (Pl. 4) from loc. 29 (somewhat below 22) suggest the Turonian age of the lower member, although its upper portion could be Coniacian. Mytilodes sp. nov. (?) from the upper member is an interesting example of the genus in the Santonian, but too poorly preserved to define a species. An ammonite from loc. 04 is Hauericeras (?) sp. aff. H. angustum. Some discussion is given on the palaeoenvironment of the Terasoma Formation.
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Kiyotaka Chinzei
Article type: Article
1982 Volume 32 Pages
19-27
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Hidekuni Matsuo
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1982 Volume 32 Pages
29-31
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A. OMURA
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1982 Volume 32 Pages
32-
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Hidekuni Matsuo, Takeshi Kozai
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1982 Volume 32 Pages
33-35
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[in Japanese]
Article type: Article
1982 Volume 32 Pages
36-
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[in Japanese]
Article type: Article
1982 Volume 32 Pages
36-
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[in Japanese]
Article type: Article
1982 Volume 32 Pages
36-
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[in Japanese]
Article type: Article
1982 Volume 32 Pages
36-
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[in Japanese]
Article type: Article
1982 Volume 32 Pages
36-
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[in Japanese]
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1982 Volume 32 Pages
36-
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Kiyoshi Takahashi
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1982 Volume 32 Pages
37-38
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Akio Omura
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1982 Volume 32 Pages
39-47
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1982 Volume 32 Pages
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[in Japanese]
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1982 Volume 32 Pages
48-
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[in Japanese]
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1982 Volume 32 Pages
48-
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Tamio Kotaka
Article type: Article
1982 Volume 32 Pages
49-52
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Article type: Appendix
1982 Volume 32 Pages
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1982 Volume 32 Pages
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Article type: Cover
1982 Volume 32 Pages
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1982 Volume 32 Pages
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