Geology and Molluscan Fossils from the Cretaceous Misakubo Formation, Northern Part of Shizuoka Prefecture, Japan

Yoshihara, Kazuki; Komatsu, Toshimitsu

doi:10.5026/jgeography.115.5_626

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…1984; Maeda et al. 1987; Maeda 1987; Yoshihara & Komatsu 2006). Although these contemporaneous deposits are fragmentarily distributed on the Chichibu Belt, they have sedimentological and paleontological characteristics similar to that of the Aridagawa area (see previous chapter).…”

Section: Mid‐ To Upper Cretaceous Sedimentary Basin On the Chichibu Beltmentioning

confidence: 99%

Stratigraphy of the mid‐ to upper‐Cretaceous System in the Aridagawa area, Wakayama, Southwest Japan

Misaki¹,

Maeda

2010

Island Arc

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The litho-and biostratigraphy of the mid-to upper-Cretaceous System around the Yagumaike Pond in the Aridagawa area, Wakayama, Southwest Japan, were investigated. Many Middle to Late Albian megafossils were found in the strata of a block bounded by faults. It was also revealed that the Upper Cretaceous System of other blocks ranges from the Middle Turonian to Santonian. The Albian megafossil assemblage contains few benthic organisms, in contrast with the abundance of nektons found (e.g. cephalopods). Sedimentological observations of the mudstone profiles also indicate that scarcely or weakly bioturbated, well-laminated mudstone is dominant among the Albian deposits. These results suggest deposition of the Albian mudstone under a dysaerobic to anoxic environment. It is comparable to the extended oceanic anoxia (OAEs) in mid-Cretaceous time. Albian deposits with similar characteristics are also known to exist in Shikoku, Southwest Japan. A wide sedimentary basin that was directly affected by global environmental events, such as OAEs, seemed to be formed on the Chichibu Belt in the Albian. The Upper Cretaceous strata in the study area are extremely thin, similar to the coeval deposits on the Chichibu Belt in Shikoku. It is suggested that the sedimentation rate in the sedimentary basin on the Chichibu Belt was extremely low during early Late Cretaceous time.

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Section: Mid‐ To Upper Cretaceous Sedimentary Basin On the Chichibu Beltmentioning

confidence: 99%

Stratigraphy of the mid‐ to upper‐Cretaceous System in the Aridagawa area, Wakayama, Southwest Japan

Misaki¹,

Maeda

2010

Island Arc

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“…Goshoraia crenulata is found in abundance in upper Albian to lower Cenomanian brackish‐water to shallow‐marine facies, such as the Mikasa Formation (Yezo Group, lower Cenomanian) of Hokkaido, northern Japan, the Misakubo Formation (upper Albian) of Shizuoka, central Japan and the Enokuchi Formation (Goshoura Group, upper Albian – lower Cenomanian) of Kumamoto, Kyushu, south‐west Japan (Fig. 1A; compare Matsumoto 1938; Komatsu and Maeda 2005; Yoshihara and Komatsu 2006). Shell size varies according to depositional environment (Figs 2–6), the depth of the pallial sinus being moderate for the genus and the tip of the pallial sinus angular.…”

Section: Morphology Of Goshoraiamentioning

confidence: 99%

“…Goshoraia crenulata is a subordinate species, accounting for 5–15 per cent. In addition, G. crenulata is known from other Pterotrigonia – Cucullaea bivalve assemblages, such as those of P. pustulosa – C. delicatostriata and P. pustulosa – C. ezoensis in shelf deposits in the Mikasa Formation (Hokkaido) and the Misakubo Formation of Shizuoka (Yoshihara and Komatsu 2006). Furthermore, in the Goshoura Group, transitional inner to outer shelf facies also yield common G. crenulata , Pterotrigonia obsoleta (Nakano, 1958) and the parallelodontid Nanonavis pseudocarinata Tashiro and Matsuda, 1982 (Komatsu and Maeda 2005; Komatsu et al .…”

Section: Bivalve Assemblages and Depositional Faciesmentioning

confidence: 99%

Palaeoecology of the mid‐Cretaceous siphonate bivalve genus Goshoraia (Mollusca, Veneridae) from Japan

Komatsu¹

2013

Palaeontology

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The mid-Cretaceous bivalve Goshoraia Tamura, 1977, endemic to Japan, is an early example of shallow-marine siphonate bivalves of the family Veneridae Rafinesque, 1815. Three species, including one new, are here described: Goshoraia minor Tashiro and Kozai, 1989 (Aptian), G. crenulata (Matsumoto, 1938; Albian-lower Cenomanian) and G. maedai sp. nov. (middle to ?upper Cenomanian). The habitats of Goshoraia have been extensively compared with those of common Cretaceous, nonsiphonate burrowers, such as trigoniids, which range from tidal flat and shoreface to shelf environments. Depth of burial, which can be estimated from the extent of the pallial sinus, increases from the ancestral G. minor to its descendants G. crenulata and G. maedai sp. nov., documenting that the ability to burrow within this genus improved in time. These morphological and palaeoecological changes may be related to the Mesozoic marine revolution during the mid-Cretaceous.

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Reconstruction of the Cretaceous continental arc–trench system of the Japanese Islands: a basis for Cretaceous palaeoenvironmental studies

Ando,

Takahashi

2024

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Spatiotemporal distributions of Cretaceous rocks differs markedly between the Southwest (SW) and Northeast (NE) Japan arcs. However, four parallel zonal arrangements of rocks are recognized broadly throughout both arcs: mostly non-marine sedimentary rocks in backarc/intra-arc basins; granitic and volcanic rocks in magmatic arcs; predominantly marine and subordinately fluvial sedimentary rocks in forearc basins; and sedimentary rocks of turbiditic and mélange facies in accretionary complexes. These zones constituted a palaeo-Japan continental arc-trench system during the Cretaceous. We describe and correlate 71 Cretaceous backarc/intra-arc and forearc basinal successions from Kyushu (south) to Hokkaido (north) islands, including a southern Sakhalin and two Kuril Arc (eastern Hokkaido) successions. Stratigraphic ranges and major sedimentary facies are generally similar between the SW and NE Japan arcs, except for the pre-Aptian Lower Cretaceous in Hokkaido of NE Japan, suggesting continuity throughout the two arcs during the Cretaceous. Although Cretaceous strata are sporadically exposed in northern Honshu, NE Japan, interpretation of seismic sections suggests that Cretaceous forearc sedimentary rock measuring several tens of kilometres laterally are developed offshore beneath the present Pacific forearc. In contrast, Cretaceous forearc strata in southern SW Japan are distributed along two narrow belts that may have been deformed by post-Early Miocene tectonism.

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Geology and Molluscan Fossils from the Cretaceous Misakubo Formation, Northern Part of Shizuoka Prefecture, Japan

Cited by 5 publications

References 6 publications

Stratigraphy of the mid‐ to upper‐Cretaceous System in the Aridagawa area, Wakayama, Southwest Japan

Stratigraphy of the mid‐ to upper‐Cretaceous System in the Aridagawa area, Wakayama, Southwest Japan

Palaeoecology of the mid‐Cretaceous siphonate bivalve genus Goshoraia (Mollusca, Veneridae) from Japan

Reconstruction of the Cretaceous continental arc–trench system of the Japanese Islands: a basis for Cretaceous palaeoenvironmental studies

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