Masaki Takahashi, Masayuki Oda, Etsuo Uchida,
This chapter discusses the preliminary results and potential for integrated stratigraphy of the volcano-sedimentary sequence in the Boso peninsula, Central Japan. The thick sequence of fossiliferous Neogene and Pleistocene marine sediments in the Boso Peninsula of Central Japan is one of the most promising sites in Japan for studies of Neogene geology and micropalaeontology. This sequence contains only one stratigraphic break (the Kurotaki Unconformity) and may provide a continuous stratigraphic ...
Tópico(s): Paleontology and Stratigraphy of Fossils
1995 - Elsevier BV | Developments in palaeontology and stratigraphy
Yoko Michiguchi, Yujiro Ogawa,
Unique planar structures made of thin, dark bands in host siltstones were described at microscopic scale in samples collected from the Tenryu Canyon in the eastern Nankai accretionary prism. Their mechanisms of formation and tectonic relationships were compared with similar onshore examples from the unmetamorphosed Miocene–Pliocene Miura–Boso accretionary prism. Four modes of occurrences that had been identified previously in onshore rocks were recognized in the submarine rock samples. The dark ...
Tópico(s): Geology and Paleoclimatology Research
2011 - Springer Nature (Netherlands) | Modern approaches in solid earth sciences
房総半島南部の保田低地には,高位から保田I面,II面,III面,IV面の4面の完新世海岸段丘が発達する.詳細な地形・地質調査の結果,従来,元禄地震時(1703年)の地震隆起に伴い形成されたと考えられていた最低位の保田IV面は,段丘面上の泥炭の年代,歴史的遺物の証拠から元禄地震以前に離水していたことが明らかになった.さらに,地形的証拠と古文書・古絵図の記載から判断すると,保田低地は元禄地震時に沈降したと考えられる.また,保田I面,保田II面は4,350yrs BPより前,保田III面は2,200yrs BPより前に離水しており,いわゆる元禄型地震によって離水した沼面群とは対比できない可能性がある.これは,元禄型地震のたびに保田低地が沈降していることを示唆する.保田面群の成因を大正型地震によるものと考えれば,保田I面の旧汀線高度から,大正型地震の平均再来周期は670年以内であると推測される.
Tópico(s): Earthquake and Disaster Impact Studies
1999 - | The Quaternary Research (Daiyonki-Kenkyu)
Soshi Inutsuka, Katsuyuki Hamasaki, Shigeki Dan, Shuichi Kitada,
The present study was conducted to examine the occurrence and distribution of early juvenile land hermit crabs of the genus Coenobita on a small beach on the Boso Peninsula, Japan as a basis for understanding the important habitats that land hermit crabs use during the sea-to-land transition. The survey sites were supratidal zones at six points with heterogeneous topography, and visual surveys for early juveniles were conducted from middle July to late October in 2015 and 2016. The number of empty ...
Tópico(s): Coral and Marine Ecosystems Studies
2020 - Sociedade Brasileira de Carcinologia | Nauplius
Along the southern coast of the Boso Peninsula, located about 80km south of Tokyo, have developed Holocene coastal terraces, which were elucidated to have been uplifted by tectonic movements associated with major earthquakes (Sugimura & Naruse, 1954; Matsuda et al., 1974). Some of these coastal terraces are composed of marine sediments, about 20m thick, whose facies changes reflect the fluctuation of sea-level relative to the land. The author has investigated these terraces to clarify the role of tectonic ...
Tópico(s): Earthquake and Tsunami Effects
1978 - Association of Japanese Geographers | Geographical Review of Japan
The Obitsu and the Yoro rivers are located in the central part of the Boso Peninsula. Meandsring valleys and many strath river terraces are developed well in the upper to middle courses of both rivers. On the basis of the topographic classification of those terracces by the aerial photo interpretation, the past developmental process of valley incision can be deduced from the distribution characters of those terraces. The past developmental process of the Alluvium deposition in the lower courses ...
Tópico(s): Geology and Paleoclimatology Research
1982 - Association of Japanese Geographers | Geographical Review of Japan
Shoichi Hachinohe, Nobuaki Hiraki, Takasuke Suzuki,
Tópico(s): Landslides and related hazards
2000 - Elsevier BV | Developments in geotechnical engineering
... intertidal hermit crabs Pagurus geminus McLaughlin, Pagurus lanuginosus De Haan and Clibanarius virescens (Krauss) on a rocky shore of Kominato, Boso Peninsula, Japan, are described. Although the distribution of each ...
Tópico(s): Marine Biology and Ecology Research
1994 - Elsevier BV | Journal of Experimental Marine Biology and Ecology
Michiro Fujihara, Keitarou Hara,
Tópico(s): Financial Crisis of the 21st Century
2011 - De Gruyter Open | Journal of Landscape Ecology
Gerasimos Voulgaris, Yuji Murayama,
The Boso Peninsula is located in East Japan north of the Sagami Trough, which has historically given tsunamigenic earthquakes. We have selected the southern part of the peninsula, namely the villages of Aihama and Mera, which belong to the city of Tateyama, and used a tsunami vulnerability assessment tool (Papathoma Tsunami Vulnerability Assessment model) for 358 buildings located there, for a tsunami scenario with a maximum run-up of 10 m. Additionally, we applied a building population estimation ...
Tópico(s): Earthquake and Disaster Impact Studies
2014 - Elsevier BV | International Journal of Disaster Risk Reduction
Mahito Watanabe, Masaki Takahashi,
Diatom biostratigraphy is established for the Middle Miocene Kinone and lower Amatsu Formations in Boso Peninsula, central Japan. Diatom zones of Denticulopsis lauta Zone through D. praedimorpha Zone are recognized in 15 calcareous nodules out of 79 collected samples in the study area. The middle and upper part of the Kinone Formation is assigned to Denticulopsis lauta and Denticulopsis hyalina Zones. The Crucidenticula nicobarica Zone is recognized at around the boundary between Kinone and Amatsu ...
Tópico(s): Paleontology and Stratigraphy of Fossils
1997 - Japanese Association for Petroleum Engineers | Journal of the Japanese Association for Petroleum Technology
Tetsuya Kawabe, Keiichiro OHNO, Shiro Maeda,
1) This research was carried out, in order to clarify the stratigraphic relationship between the Katsuura and the Kurotaki Formations, particular attention being given to the tephra key bed known in the Katsuura district, which is named Kr in this article. The tephra key bed, outcropping in the area around Kasugadai and the Katsuura Bridge, in Katsuura city, was dealt as typical Kr.2) In the eastern part of the area, the strike of Kr runs NNE-SSW, but ENEWSW in the western part. Since Kr is cut ...
Tópico(s): Earthquake and Disaster Impact Studies
1981 - Taylor & Francis | Journal of Geography (Chigaku Zasshi)
Mahito Watanabe, Masaki Takahashi,
房総半島鴨川市の川谷セクションにおいて31個の石灰質ノジュール試料を採取し, 9試料から珪藻化石が産出した.木の根層上部から天津層最下部にかけてDenticulopsis hyalina帯(NPD 4B), Crucidenticula nicobarica帯(NPD 5A)およびDenticulopsis praedimorpha帯(NPD 5B)が認められた.また, 神川層上部の再堆積したノジュールからThalassiosira fraga帯(NPD 2A)に相当する珪藻化石が産出した.天津層の最下部に, D.praedimorpha var. minorの初産出(D51), C.nicobaricaの終産出(D52), Denticulopsis crassaの第一アクメ(D52.5)およびD.praedimorpha var. praedimorphaの初産出(D53)が見いだされた.これらの珪藻化石生層準と他の浮遊性微化石生層準の層位関係を整理し, さらに他地域でのそれらの関係と比較した.
Tópico(s): Paleontology and Stratigraphy of Fossils
2000 - The Meteorological Society of Japan | The Journal of the Geological Society of Japan
Densities of nucleation sites of clinopyroxene, plagioclase and spherulite were measured and their morphologies were observed from the core to the outer parts of a pillow lava of tholeiitic basalt collected at Awa-Kamogawa, Boso Peninsula. Systematic changes of nucleation densities and morphologies were observed, which were interpreted in terms of the sample's cooling history. It was concluded that the lava had solidified within an hour, and that changes in nucleation densities and morphology represented ...
Tópico(s): Crystallization and Solubility Studies
1981 - Japan Association of Mineralogical Sciences | The Journal of the Japanese Association of Mineralogists Petrologists and Economic Geologists
River Maruyama and River Wada are located in southern part of Boso Peninsula, Along both rivers, One Pleistocene terrace and three Holocene terrace series can be observed. Upper Holocene terrace (Maruyama I terrace) is distributed widely from the upper to lower course. By field observations of terrace deposits, Maruyama I terrace is thought to be the fluvial fill-top terrace. Only in the lower course, drowned valley had been formed and marine silt and clay with shell fragements had been deposited ...
Tópico(s): Earthquake and Disaster Impact Studies
1985 - Association of Japanese Geographers | Geographical Review of Japan
Tópico(s): Earthquake and Disaster Impact Studies
2016 - Lippincott Williams & Wilkins | The American Journal of Gastroenterology
Tomoyuki Komai, Michio Imafuku,
ABSTRACT Two chromatic morphs of Pagurus lanuginosus de Haan, 1849, of Imafuku and Ikeda (1995) are here recognized as 2 distinct species: the black spot morph is referred to true P. lanuginosus,and the white spot morph is described herein as a new species, P. maculosus. The range of P. maculosus appears restricted to the Pacific coast of the Japanese main islands from Boso Peninsula to Amakusa, Kyushu. Pagurus lanuginosus is considered to be more widely distributed in the Japanese main islands, Korea, and the Russian coast of ...
Tópico(s): Cephalopods and Marine Biology
1996 - Oxford University Press | Journal of Crustacean Biology
Masami Ichikawa, Keihachiro Shimizu,
This paper is a preliminary report of the landslide in the southern part of BOSO Peninsula at Soro Village. The landslide of Soro Village, situated 6 km., west of the town of Kamo-gawa, occurred on May 23, 1952 near the top of Mineokn Mountain and gradually enlarged and extended itself down the slope. The mechanics of the landslide may be explained as follows 1) The serpentine was distributed in the vicinity of the divide of Mineoka Mountain and was weathered in depth. When a great amount of ground- ...
Tópico(s): Earthquake and Disaster Impact Studies
1953 - Association of Japanese Geographers | Geographical Review of Japan
Tópico(s): Earthquake and Disaster Impact Studies
1989 - | Journal of the Japan Landslide Society
Masanobu Shishikura, Takanobu Kamataki, Osamu Fujiwara,
フィリピン海プレートが沈み込む相模トラフ沿いでは，過去からプレート間地震（いわゆる関東地震）がくり返し生じてきた．歴史上に記録されている1703年元禄関東地震と1923年大正関東地震では，南関東沿岸に地殻変動を伴い，大きな津波が襲ったことが知られている．地殻変動は海岸段丘などの離水海岸地形や隆起生物遺骸として，また津波は津波堆積物として，それぞれ地形や地層に記録されている．房総半島南部沿岸では，地殻変動や津波の影響を特に大きく受け，複数のレベルに海岸段丘が発達していたり，縄文海進期の内湾堆積物中に複数枚の津波堆積物が挟まれていたりする．これらの記録を解読することで，過去7000年から8000年以上に渡る地震や津波の履歴を復元することができる．
Tópico(s): Earthquake and Disaster Impact Studies
2016 - The Meteorological Society of Japan | The Journal of the Geological Society of Japan
... intertidal hermit crabs Pagurus geminus McLaughlin, Pagurus lanuginosus De Haan and Clibanarius virescens (Krauss) on a rocky shore of Kominato, Boso Peninsula, Japan, are described. Although the distribution of each ...
Tópico(s): Coral and Marine Ecosystems Studies
1995 - Elsevier BV | Oceanographic literature review
Produção Nacional
Revisado por pares
Eijiroh Nishi, Julie H. Bailey‐Brock, André Souza dos Santos, Hiroyuki Tachikawa, Elena K. Kupriyanova,
... shallow waters off Onjuku, the Pacific side of Boso Peninsula, Chiba, Japan. Sabellaria isumiensis n. sp. is a ...
Tópico(s): Marine and environmental studies
2010 - Q15088586 | Zootaxa
Jiro Hirayama, Terumasa Nakajima,
ABSTRACT On the Boso Peninsula, southeast of Tokyo, individual turbidite layers have been traced over about 38 km with the aid of tuff marker‐ ...
Tópico(s): Landslides and related hazards
1977 - Wiley | Sedimentology
... affect wild boar damage to rice paddies in Boso Peninsula, Japan. Crop Protection, 30, 1048– 1054. Santilli F ...
Tópico(s): Animal Behavior and Welfare Studies
2014 - Wiley | EFSA Journal
Neal R. O’Brien, K. Nakazawa, Shûichi Tokuhashi,
... Holocene siltstones and silts in outcrops from the Boso Peninsula, Japan and in cores from the East China ...
Tópico(s): Geology and Paleoclimatology Research
1980 - Wiley | Sedimentology
... of the middle Pleistocene Ichijiku Formation of the Boso peninsula, Japan. It consists of dominant B. monastiriensis and ...
Tópico(s): Geology and Paleoclimatology Research
2020 - Sociedad Española de Paleontología | Spanish Journal of Palaeontology
Yujiro Ogawa, Yukio Yanagisawa,
... Bonin forearc and in subaerial exposures on the Boso Peninsula. The instability of the Boso triple junction system since the Miocene is attributed ...
Tópico(s): Methane Hydrates and Related Phenomena
2011 - Springer Nature (Netherlands) | Modern approaches in solid earth sciences
Nobuyuki Yonekura, Ikuo Suzuki, Motohiro Hasegawa, Yo Uesugi, Kunihiko Endo, Atsumasa Okada, Toshio KAWANA, Kayo ISHIKAWA, Masami Fukuda,
... Bay of Sagami and the southern coast of Boso Peninsula, where there are coastal terraces. These Holocene terraces ... the Numa terraces in the southern part of Boso Peninsula.From these data and data from the field ...
Tópico(s): Geology and Paleoclimatology Research
1968 - | The Quaternary Research (Daiyonki-Kenkyu)
Shoji Tonouchi, Toshio Furuta, Kazuo Kobayashi,
... Maizuru district (Paleozoic). From the dike basalt of Boso Peninsula to the least altered dike basalts of Miura ...
Tópico(s): Geological Formations and Processes Exploration
1981 - Taylor & Francis | Journal of Geography (Chigaku Zasshi)
Takeshi Iinuma, Ryota Hino, Motoyuki Kido, Yukihito Osada, Daisuke Inazu, Yoshihiro Ito, Syuichi Suzuki, Yusaku Ohta, Hiromi Fujimoto,
... approximately 30 km in the segment off the Boso Peninsula have not yet been released and continue to ...
Tópico(s): GNSS positioning and interference
2015 - Springer Nature | International Association of Geodesy symposia