Geology and ages of the Plio-Pleistocene sedimentary rocks on the western margin of the Kitakami Lowland, Northeast Japan: re-examination of the so-called "Motohata Formation".

雅之, 大石; 裕生, 吉田; 光男, 金; 幸夫, 柳沢; 了三, 杉山

doi:10.5575/geosoc.102.330

Cited by 8 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 and 3). The Tatsunokuchi Formation conformably overlies the Ishibane Formation and is unconformably overlain by the Motohata Formation (Oishi et al, 1996. The Ishibane Formation unconformably overlies basement rocks of the late Miocene Hishinai Formation and Maetsukamiyama acidic volcanic rock (Oishi et al, 1996 (Fig.…”

Section: Geologic and Stratigraphic Frameworkmentioning

confidence: 99%

“…3). The Ishibane and Motohata formations consist of nonmarine deposits that are composed of conglomerate, sandstone, mudstone, and lignite, whereas the Tatsunokuchi Formation is composd of marine deposits that are composed of bluish gray mudstone with thin sandstone beds (Oishi et al, 1996).…”

Section: Geologic and Stratigraphic Frameworkmentioning

confidence: 99%

“…1 Location map of the study area and geologic setting around the study area (modified from Oishi et al, 1996). , whereas the age of the Semi-Onsen tuff in the middle part of the Motohata Formation is 3.9±0.4 Ma (Oishi et al, 1996) (Figs. 2 and 3).…”

Section: Geologic and Stratigraphic Frameworkmentioning

confidence: 99%

“…Miocene and Pliocene deposits in the study area are divided into the Ishibane, Tatsunokuchi, and Motohata formations, in ascending order (Oishi et al, 1996 (Figs. 2 and 3).…”

Section: Geologic and Stratigraphic Frameworkmentioning

confidence: 99%

“…on the basis of FT ages (Oishi et al, 1996; and diatom biostratigraphy (Yanagisawa, 1998). A cycle of 0.5 to 3 m.y.…”

Section: Sequence Stratigraphymentioning

confidence: 99%

See 4 more Smart Citations

High-resolution sequence stratigraphy in an incised-valley system on the basis of sedimentary organic matter, sulfur content and fossil diatom: An example from Miocene to Pliocene Tatsunokuchi Formation, Iwate Prefecture, Northeast Japan

Yoshida

Inoue

Hoyanagi

et al. 2011

Jour. Sed. Soc. Japan

Self Cite

View full text Add to dashboard Cite

This paper discusses relationship among depositional environments, origin of the sedimentary organic matter and diatom fossil assemblage, combined with sequence stratigraphy in an incised-valley system. Interpretation of the environments and their changes was based on sedimentary facies, total sulfur (TS) content, and diatom assemblages. The quantity and composition of organic matter were estimated for the environmental interpretation on the basis of the total organic carbon (TOC) content, reflected-light fluorescent microscopy, and stable carbon isotope ratios of the organic matter (d 13 C org ). The Miocene to Pliocene Ishibane, Tatsunokuchi and Motohata formations in northeast Japan consist of estuarine and fluvial deposits that were formed during a rise and fall of sea level. The proportions of vitrinite and cutinite that are coarse-grained and terrestrial in origin are relatively high in fluvial deposits of the lowstand systems tract. The proportion of marine alginite, TOC content, and d 13 C org values increase upward in estuary deposits of the transgressive systems tract. This implies the increase in the influence of the sea and the estuarine bottom conditions becoming anoxic. The proportions of vitrinite and cutinite increase upward in the highstand systems tract, whereas the d 13 C org values and TOC content decrease upward. These reflect the strong influence of river discharge. Variations of diatom fossil assemblage of fresh water, brackish water, intertidal, coastal marine and open marine species indicate the same repetitions of transgression and regression in the Tatsunokuchi Formation. Therefore, the transgressive systems tract in the Tatsunokuchi Formation includes four cycles of transgression and regression, while highstand systems tract shows one cycle of transgression and regression.

show abstract

Section: Geologic and Stratigraphic Frameworkmentioning

confidence: 99%

Section: Geologic and Stratigraphic Frameworkmentioning

confidence: 99%

Section: Geologic and Stratigraphic Frameworkmentioning

confidence: 99%

“…Miocene and Pliocene deposits in the study area are divided into the Ishibane, Tatsunokuchi, and Motohata formations, in ascending order (Oishi et al, 1996 (Figs. 2 and 3).…”

Section: Geologic and Stratigraphic Frameworkmentioning

confidence: 99%

“…on the basis of FT ages (Oishi et al, 1996; and diatom biostratigraphy (Yanagisawa, 1998). A cycle of 0.5 to 3 m.y.…”

Section: Sequence Stratigraphymentioning

confidence: 99%

See 3 more Smart Citations

High-resolution sequence stratigraphy in an incised-valley system on the basis of sedimentary organic matter, sulfur content and fossil diatom: An example from Miocene to Pliocene Tatsunokuchi Formation, Iwate Prefecture, Northeast Japan

Yoshida

Inoue

Hoyanagi

et al. 2011

Jour. Sed. Soc. Japan

Self Cite

View full text Add to dashboard Cite

show abstract

Les faunes terrestres quaternaires des Îles du Japon

Takahashi

Tomida

2021

L'Anthropologie

View full text Add to dashboard Cite

Sequence stratigraphy and organic matter preservation of the Miocene to Pliocene Tatsunokuchi Formation, Iwate, Northeast Japan

Yoshida

Hoyanagi

Kondo

et al. 2007

Journal of the Sedimentological Society of Japan

View full text Add to dashboard Cite

formations, in ascending order (Fig.). The Tatsuno-Tatsunokuchi and Motohata formations that occur in Kitakami City, Iwate, Northeast Japan. These formations Facies A (m thick) consists of poorly sorted, clastsupported and pebble-size conglomerate. Conglomerate clasts are rounded to subrounded. The matrix consists of coarse-grained sandstone. This facies exhibits normal grading and has channelized bases. Facies A erosionally overlies Facies C. Facies A is interpreted as fluvial channel deposits, because they exhibit channelized bases, conglomerate fa

show abstract

Geology and ages of the Plio-Pleistocene sedimentary rocks on the western margin of the Kitakami Lowland, Northeast Japan: re-examination of the so-called "Motohata Formation".

Cited by 8 publications

References 8 publications

High-resolution sequence stratigraphy in an incised-valley system on the basis of sedimentary organic matter, sulfur content and fossil diatom: An example from Miocene to Pliocene Tatsunokuchi Formation, Iwate Prefecture, Northeast Japan

High-resolution sequence stratigraphy in an incised-valley system on the basis of sedimentary organic matter, sulfur content and fossil diatom: An example from Miocene to Pliocene Tatsunokuchi Formation, Iwate Prefecture, Northeast Japan

Les faunes terrestres quaternaires des Îles du Japon

Sequence stratigraphy and organic matter preservation of the Miocene to Pliocene Tatsunokuchi Formation, Iwate, Northeast Japan

Contact Info

Product

Resources

About