| JaLCDOI | 10.18926/ESR/58575 |
|---|---|
| Title Alternative | Schistose fault related rocks from the Sangun Metamorphic Rocks, Kawakita area, Misaki Town, Okayama Prefecture, SW Japan |
| FullText URL | esr_026_019_024.pdf |
| Author | MATSUSHITA, Mirei| SUZUKI, Shigeyuki| |
| Abstract | The crystalline schist which is representatively exposed in the Innerside of Southwest Japan is called the Sangun Metamorphic Rocks (SMR). In Kawakita area, Misaki Town, Okayama Prefecture, schistose fault rocks which is newly described in below are intercalated in the SMR. The rocks are composed of lenticular fragments of pelitic, basic siliceous rocks and quartz vein with siliceous to pelitic matrix. The fine-grained muscovites which define schistosity penetrate the rocks. Major direction of layer which though to reflect slip plane is subparallel to the schistosity. The long axis of some fragments are slightly oblique to the schistosity. The combination of the two sets of planes is considered to be a composite planar fabric. These occurrences suggest that the rocks are fault rock before the Sangun Metamorphism and named as schistose fault rocks. Lenses of cataclasite and myronite are accompanied. Planar thin (about 10cm in thickness) brittle fault rock is also associated. These shear deformed rocks form units of layer (shear zone) of 10 to 100m in thickness, and are concordantly intercalated in the surrounded normal schists. Active periods of the shear zones had several times from before and after the event of the Sangun Metamorphism. |
| Keywords | Sangun Metamorphic Rocks regional metamorphism shear deformation schistose fault rock |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2019-12-27 |
| Volume | volume26 |
| Issue | issue1 |
| Start Page | 19 |
| End Page | 24 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| Title Alternative | Bulletin of Archaeological Research Center Okayama University 2017 |
|---|---|
| FullText URL | 紀要2017.pdf |
| Author | Nozaki, Takahiro| Minami, Kentaro| Yamamoto, Etsuyo| Suzuki, Shigeyuki| Yamaguchi, Yuji| Iwasaki, Shiho| 古環境センター| 吉田生物研究所| |
| Publication Title | 岡山大学埋蔵文化財調査研究センター紀要 |
| Published Date | 2019-03-29 |
| Volume | volume2017 |
| language | 日本語 |
| Copyright Holders | Archaeological Research Center, Okayama University |
| File Version | publisher |
| Pages | v, 96 p. |
| JaLCDOI | 10.18926/ESR/56695 |
|---|---|
| FullText URL | esr_025_039_048.pdf |
| Author | Knittel, Ulrich| Walia, Monika| Suzuki, Shigeyuki| Lee, Yuan-Hsi| |
| Abstract | The high-P/low-T Sanbagawa Metamorphic Belt that traverses SW Japan, has been subdivided into two belts thought to have been metamorphosed at ca. 120 Ma and at ca. 65 Ma (‘Sanbagawa Metamorphic Rocks’ and ‘Shimanto Metamorphic Rocks’). The subdivision was based on the assumption that metamorphism occurred at ca. 116 Ma, largely based on an early Rb-Sr isotope study and zircon data obtained for the eclogite unit of the Sanbagawa Belt, whereas in some parts of the belt detrital zircons of late Cretaceous age (90-80 Ma) were discovered. Analysis of detrital zircons sampled from two sites within the area considered to expose the older ‘Sanbagawa Metamorphic Rocks’, including the area investigated by the Rb-Sr study, reveals the presence of zircons younger than 95 Ma in all samples and some grains as young as 80 ± 4 Ma. It is therefore concluded that the Sanbagawa Belt is one single tectonic entity that formed in the Late Cretaceous though it contains older components, including fossiliferous clasts, older basic meta-volcanics and eclogite units that may record earlier metamorphic events. |
| Keywords | U-Pb zircon dating Sanbagawa Metamorphic Belt Late Cretaceous Asemi River |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2018-12-27 |
| Volume | volume25 |
| Issue | issue1 |
| Start Page | 39 |
| End Page | 48 |
| ISSN | 1340-7414 |
| language | 英語 |
| Copyright Holders | © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| JaLCDOI | 10.18926/ESR/56694 |
|---|---|
| FullText URL | esr_025_031_038.pdf |
| Author | Amano, Hideki| Suzuki, Shigeyuki| Sato, Masaru| Yanagida, Makoto| |
| Abstract | The study area is situated in Japan Sea side margin of the Shakotan Peninsula, Hokkaido, Japan, where MIS5e Terrace is preserved along the cost. Numbers of tight drilling have done to establish new method for terrace analysis. Buried wave cut terrace and sea cliff (when the MIS5e Terrace was formed) are reconstructed by distribution of the terrace deposits and these bottom of unconformity planes. The precise site and altitude of former shoreline was also obtained. Altitudes of the former shoreline from the 7 sections are almost the same 22 to 27m in height. Previous data of the height of shoreline are obtained from the topographic MIS5e Terrace surface. The altitudes have variation from 30m to 60m. It suggests that the traditional method for the MIS5e terrace analysis had some errors in the study area. |
| Keywords | MIS5e marine terrace terrace deposits tight drilling shoreline |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2018-12-27 |
| Volume | volume25 |
| Issue | issue1 |
| Start Page | 31 |
| End Page | 38 |
| ISSN | 1340-7414 |
| language | 英語 |
| Copyright Holders | © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| JaLCDOI | 10.18926/ESR/56691 |
|---|---|
| Title Alternative | Non-calcareous beachrock found in Akagurisaki, Ohi Town, Fukui Prefecture |
| FullText URL | esr_025_001_005.pdf |
| Author | Suzuki, Shigeyuki| Azuma, Yoichi| Deyama, Yasuyo| Yukawa, Hirokazu| Usui, Mayumi| |
| Abstract | Beachrock which was formed about 0.5 meter higher than high tide is found in Akagurisaki, Ohi Town, Fukui Prefecture. The outcrops always get wet by spring water. The sediments are composed of well sorted rounded gravels and sands but calcareous shell is not found at all. Intergranular space is occupied by white amorphous cement. Magnesium and silicon rich composition of the cement is obtained by EPMA analysis. There is a conjecture that the magnesium rich cement was precipitated in spite of solution of calcareous shell under saturated state by spring water, because calcium has a higher tendency to ionize than magnesium. |
| Keywords | Beachrock Akagurisaki non-calcareous cement ionization tendency |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2018-12-27 |
| Volume | volume25 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 5 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| Author | Yamamoto, Etsuyo| Yamaguchi, Yuji| Suzuki, Shigeyuki| |
|---|---|
| Published Date | 2018-02 |
| Content Type | Research Paper |
| Title Alternative | Bulletin of Archaeological Research Center Okayama University 2016 |
|---|---|
| FullText URL | barc_2016.pdf |
| Author | Yamaguchi, Yuji| Yamamoto, Etsuyo| Suzuki, Shigeyuki| Iwasaki, Shiho| 白石 純| Minami, Kentaro| Nozaki, Takahiro| 佐藤 朗| 二宮 和彦| |
| Publication Title | 岡山大学埋蔵文化財調査研究センター紀要 |
| Published Date | 2018-03-28 |
| Volume | volume2016 |
| language | 日本語 |
| File Version | publisher |
| Pages | 86 |
| JaLCDOI | 10.18926/ESR/55322 |
|---|---|
| FullText URL | esr_023_1_009_015.pdf |
| Author | Takesue, Norito| Suzuki, Shigeyuki| |
| Abstract | Analyzing of sedimentary facies and structure together with regional field mapping were studied in the mélange unit, upper Cretaceous Shimanto Belt, Wakayama Pref., SW Japan. The field survey was concentrated in the coast of Shiofuki-iwa, Miyama Complex, Hidakagawa Belt where soft deformations penetrate throughout the mélange unit. Brittle to ductile faults associated as later deformations are excluded. The mélange unit is subdivided into the Y-shear zone (YSZ) and P-foliation zone (PFZ). The YSZ is composed of thick lenticular sandstone (trends subparallel to the direction of the mélange), intense shear band (thin layer with concentrated prelithification shear deformation) and mudstone dominant mélange. The PFZ is composed of mudstone dominant mélange (associated with foliations which slightly oblique to the direction of the YSZ) and lenticular sandstone (slightly oblique to the direction of the YSZ). The intense shear band separates the YSZ and PFZ. Preserved radiolarian fossils free from deformation in the intense shear band is the evidence of the prelithification shear deformation in the mélange. A remarkable-fact is that the structures of mélange unit are formed under sinistral sense of shear. The mélange unit in the Shiofuki-iwa is ascribed to be formed by sinistral sense of shear during sediments were prelithified. |
| Keywords | mélange Shimanto Belt Y-shear zone P-foliation zone intense shear band prelithification structures |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2016-12-27 |
| Volume | volume23 |
| Issue | issue1 |
| Start Page | 9 |
| End Page | 15 |
| ISSN | 1340-7414 |
| language | 英語 |
| Copyright Holders | © 2016 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| JaLCDOI | 10.18926/ESR/55321 |
|---|---|
| Title Alternative | Risk prediction of landslide and debris flow using slope gradation map obtained from airborne laser scanning |
| FullText URL | esr_023_1_001_007.pdf |
| Author | Suzuki, Shigeyuki| Miyashita, Masashi| Hirakawa, Takeshi| Fujiwara, Mieko| Nishiyama, Satoshi| |
| Abstract | The slope gradation map which is obtained from airborne laser scanning is very important tool to detect hazardous sites of landslide, debris flow and others. The features of the images (what the images are represented) in the map were confirmed by field survey. The study area, Tamagashi is situated in the Kibi Plateau area, Okayama City, Japan. The map helps to distinguish between artificial microrelief and natural microtopography very well. Small scarps (even 0.5m high), rocky cliffs and large blocks (larger than 2m) are identified in the map. The detail images of the microrelief suggest threatening sites. The merit of the map leads us to find the site in the field easily. We will not miss the threatening sites by using the map. |
| Keywords | Risk prediction slope gradation map airborne laser scanning landslide debris flow Okayama |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2016-12-27 |
| Volume | volume23 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 7 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2016 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| JaLCDOI | 10.18926/ESR/54119 |
|---|---|
| Title Alternative | Facies analysis of the Jito Formation ( Upper Triassic Nariwa Group ) in Jito Area, Kawakami, Okayama Pref., SWJapan. |
| FullText URL | esr_022_1_031_039.pdf |
| Author | Masaoka, Yuto| Suzuki, Shigeyuki| |
| Abstract | Facies analysis and analysis of stratigraphy together with folded structure of the Norian Jito Formation were studied in Jito Area, Kawakami, Okayama Pref., SW Japan. Results of regional mapping and measured sections reconstruct three-dimensionally distribution of the Jito Formation. The Jito Formation is sub-divided into the four new members; the Shimohira Muddy Sandstone Member, the Otofuji Coarse-grained Turbidite Member, the Misawa Fine-grained Turbidaite Member, and the Ide Conglomerate Sandstone Member in ascending order. The shimohira Muddy Sandstone Member is interpreted to be deposited in an inner-bay. The Otofuji Coarse-grained Turbidite Member and The Misawa Fine-grained Turbidite Member are considered to be deposited on a continental shelf. The Ide Conglomerate Sandstone Member is inferred to be a shallow marine deposit. As a result, the Jito Formation is regarded as one transgressive-regressive package. |
| Keywords | Jito Formation Nariwa Group Norian facies analysis turbidite |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2015-12-27 |
| Volume | volume22 |
| Issue | issue1 |
| Start Page | 31 |
| End Page | 39 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2015 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| NAID | 120005728631 |
| JaLCDOI | 10.18926/ESR/54117 |
|---|---|
| Title Alternative | Petrography of foundation stones of the Bizen Kokubunji Temple, Okayama Prefecture, Japan ―an attempt to identify their collected site― |
| FullText URL | esr_022_1_025_030.pdf |
| Author | Suzuki, Shigeyuki| Nishimura, Norihide| Ariga, Yuji| |
| Abstract | The Bizen Kokubunji Temple was constructed in the 8th century, in Maya, Akaiwa City, Okayama. Only foundation stones are preserved. Geological characteristics of the foundation stones suggest that they are collected from mountain area of Maya, about 300 to 800m west from the site. The similarity of the foundation stones and the rocks Maya are identified by the following characteristics. 1) Assemblage of rock types (high grade welded tuff breccia, tuff breccia, tuffaceous sandstone and conglomerate) are the same. 2) Lithology of the 3 rock type of the foundation stones and the rocks from Maya are the same. 3) Rheomorphic flow structures are developed in both high grade welded tuff breccia. 4)Mudstone fragments are contained in both high grade welded tuff breccia tuff breccia. |
| Keywords | Bizen Kokubunji Temple foundation stone collected site Okayama |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2015-12-27 |
| Volume | volume22 |
| Issue | issue1 |
| Start Page | 25 |
| End Page | 30 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2015 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| NAID | 120005728630 |
| JaLCDOI | 10.18926/ESR/53193 |
|---|---|
| Title Alternative | Paleoparadoxia from the middle Miocene of Obara, Misaki-cho, Okayama Prefecture, Japan |
| FullText URL | esr_021_1_007_011.pdf |
| Author | Fukuchi, Akira| Suzuki, Shigeyuki| |
| Abstract | The partially preserved left humerus of the Desmostylia (Mammalia) has been collected from the riverbed in Obara, Misaki-cho, Okayama Prefecture in the western Japan. This specimen can be classified to the genus Paleoparadoxia by the following features: the absence of the supratrochlear foramen; the curved disto-lateral border of the shaft in the antero-posterior view; the medio-laterally expanded flat trochlea of humerus. Moreover, this specimen can be referred to cf. P. media on the basis of its middle-sized dimensions. This is the second occurrence of Palaeoparadoxia from Okayama Prefecture. |
| Keywords | Middle Miocene mammal Desmostylia Paleoparadoxia |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2014-12-27 |
| Volume | volume21 |
| Issue | issue1 |
| Start Page | 7 |
| End Page | 11 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2014 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| NAID | 120005567872 |
| Author | 鈴木 茂之| |
|---|---|
| Published Date | 2014-02 |
| Publication Title | 環境制御 |
| Volume | volume35 |
| Content Type | Departmental Bulletin Paper |
| Author | 野崎 貴博| 岩崎 志保| 鈴木 茂之| 山本 悦世| 南 健太郎| 田中 克典| 加藤 鎌司| |
|---|---|
| Published Date | 2013-12-27 |
| Publication Title | 岡山大学埋蔵文化財調査研究センター紀要 |
| Volume | volume2012 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/ESR/52165 |
|---|---|
| Title Alternative | On Periploma mitsuganoense Araki (Bivalvia: Mollusca) from the Miocene Bihoku Group in Niimi City, Okayama Prefecture, southwest Japan ―with special reference to it’s paleogeographic significance― |
| FullText URL | esr_020_1_007_011.pdf |
| Author | Taguchci, Eiji| Kishimoto, Shingo| Suzuki, Shigeyuki| |
| Abstract | In this paper, we deal with re-description of Periploma mitsuganoense Araki and it’s morphological variation and significance of the molluscan fauna of it from the Miocene Bihoku Group in Niimi City, Okayama Prefecture, Southwest Japan. Moreover, the paleogeographic significance of this species is analyzed. The obtained results are summarized as follows: 1. The morphological variation of Periploma mitsuganoense Araki has a wide range on the basis of the analysis of the morphological outline. 2. The occurrence of P. mitsuganoense Araki from the Pectinid fauna is the first record in the West Setouchi Geological Province. 3. It is presumable that P. mitsuganoense Araki is an endemic species in the First Setouchi Geological Province from a view point of it’s spatial distribution. |
| Keywords | Periploma mitsuganoense Araki Mollusca Miocene Bihoku Group morphological variation paleogeographic significance |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2013-12-27 |
| Volume | volume20 |
| Issue | issue1 |
| Start Page | 7 |
| End Page | 11 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2013 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| NAID | 120005394593 |
| JaLCDOI | 10.18926/ESR/52164 |
|---|---|
| Title Alternative | Debris avalanche occurred in Kitamura area, Kurashiki City, Okayama Prefecture |
| FullText URL | esr_020_1_001_006.pdf |
| Author | Kimura, Yuki| Suzuki, Shigeyuki| |
| Abstract | The debris avalanche occurred in Kitamura area, Kurashiki City, Okayama Prefecture caused by the hard rain of Typhoon 12 of September, 2011. Furthermore, 11 small landslides occurred in the study area. In this area, the altitude of mountainous are not so high (150m to 250m) and the amount of precipitation which producted the debris avalanche was not very serious quantity with 230mm. However the debris avalanche occurred. One private house collapsed, and the first floor part of the Kitamura Elementary School was buried due to the debris flow. The purpose of this study is to examine causes of the debris avalanche disaster occurred in Kitamura area using applied geological technique. The length of the debris avalanche scar is about 250m, and alluvial fan is formed as a debris slope. The ground is composed of weathered granite and the bottom of the valley was filled by soils derived from disintegrated granite. There are three small landslides as head scarps with steep slopes at approximately 30°-35°. The debris avalanche was inferred to have started as a shallow soil slip at the head by rainfall. 3 major causes are inferred which originated the debris avalanche in the study area; steep slope, ground composed of weathered granite, existence of sandy soil which occupied at the bottom of valley. |
| Keywords | debris avalanche steep slope weathered granite |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2013-12-27 |
| Volume | volume20 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 6 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2013 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| NAID | 120005394592 |
| JaLCDOI | 10.18926/ESR/49211 |
|---|---|
| Title Alternative | The oldest fossil forest in Japan discovered from the Upper Triassic Nariwa Group, Okayama Prefecture, SW Japan -Implication for reconstruction of depositional environment and paleovegetation- |
| FullText URL | esr_019_1_025_037.pdf |
| Author | Yukawa, Hirokazu| Terada, Kazuo| Sun, Ge| Suzuki, Shigeyuki| |
| Abstract | 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. |
| Keywords | erect fossil stump fossil forest Nariwa Group Upper Triassic Xenoxylon |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2012-12-26 |
| Volume | volume19 |
| Issue | issue1 |
| Start Page | 25 |
| End Page | 37 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2012 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| NAID | 120005232329 |
| JaLCDOI | 10.18926/ESR/49208 |
|---|---|
| Title Alternative | Folded structure of the Carboniferous Ko-yama Limestone Group, Akiyoshi Belt, SW JAPAN |
| FullText URL | esr_019_1_005_011.pdf |
| Author | Inada, Noriyuki| Suzuki, Shigeyuki| Ishida, Keisuke| |
| Abstract | The fold structure of the Akiyoshi Belt was analyzed in Kawakami-cho, Okayama Prefecture, where the Lower Carboniferous to Middle Permian Ko-yama Limestone Group (Yokoyama et al., 1979), Permian Yoshii Group (Sano et al., 1987) and Triassic Nariwa Group (Teraoka, 1959) are distributed. The Nariwa Group unconformably covers the Paleozoic successions (Otoh, 1985). The Lower Carboniferous to Middle Permian Ko-yama Limestone Group, dated by foraminifers and fusulinids (Yokoyama et al., 1979), is mainly composed of massive limestone with basic volcanics, acidic tuff and chert. The Paleozoic successions of the Akiyoshi Belt were folded during the Middle to Late Permian (Suzuki et al., 1990). Strata of the Ko-yama Limestone Group generally strike E-W and dip to the north. The Hoya section about 300 m thick is composed of limestone, basic tuff, chert and acidic tuff, limestone, basic lava and tuff in ascending order. In this section, Ishida et al. (2012) recognized a nearly complete conodont faunal succession ranging from the upper Visean to the lower Moscovian. The faunal succession indicates younging southward, and the strata are overturned. A folded strucuture of tight overfold with north-dipping axial plane was reconstructed. Similar style of small scale overfolds of banded chert and turbidite were observed in the overlying Yoshii Group. |
| Keywords | folded structure Ko-yama Limestone Group Carboniferous Akiyoshi Belt |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2012-12-26 |
| Volume | volume19 |
| Issue | issue1 |
| Start Page | 5 |
| End Page | 11 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2012 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| NAID | 120005232326 |
| JaLCDOI | 10.18926/ESR/49207 |
|---|---|
| Title Alternative | Holocene environmental and sea-level changes of the Okayama Plain – evidence from peat beds – |
| FullText URL | esr_019_1_001_004.pdf |
| Author | Suzuki, Shigeyuki| |
| Abstract | Quaternary peat beds from bore-hole samples deliver information to reconstruct paleoenvironment. Altitudes of dated non-marine peat beds and marine beds allow to be created a sea-level curve. 4 peat beds (A to D) are identified from the uppermost Pleistocene to Holocene deposits of the Okayama Plain. They thought to be deposited at stable events during sea-level change. |
| Keywords | Holocene peat beds paleoenvironment sea-level change Okayama Plain |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2012-12-26 |
| Volume | volume19 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 4 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2012 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| NAID | 120005232325 |
| JaLCDOI | 10.18926/ESR/47747 |
|---|---|
| Title Alternative | Newly proposed landform division in the Kibi Plateau area: Application for a hazard map of landslides |
| FullText URL | esr_018_1_005_010.pdf |
| Author | Suzuki, Shigeyuki| Omizo, Yuna| Hirata, Minoru| Nishigaki, Makoto| |
| Abstract | The Kibi Plateau is characterized by horizontal skylines and they are considered to be an uplifted peneplain. Landform of the plateaus in central part of Okayama Prefecture is divided into "Kibi plateau landform" and "Recent dissecting landform". The Kibi plateau landform is composed of low relief surface and relict mountain. The altitude of the low relief surface varies from 300 to 450m in Kayo area, and 200 to 350m in Kanayama area. The Recent dissecting landform is characterized by escarpment and cuts the Kibi plateau landform. Knick-point is formed at the boundary between two landforms and steep slope is distributed just below the knick-point. The steep slope of the recent dissecting landform is unstable and a potential of landslide is high. |
| Keywords | Kibi Plateau landslide knick-point Okayama Prefecture |
| Publication Title | Okayama University Earth Science Report |
| Published Date | 2011-12-26 |
| Volume | volume18 |
| Issue | issue1 |
| Start Page | 5 |
| End Page | 10 |
| ISSN | 1340-7414 |
| language | 日本語 |
| Copyright Holders | © 2011 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| File Version | publisher |
| NAID | 120003796475 |
