{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360565166017482624.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.margeo.2017.01.011"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0025322717300269?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0025322717300269?httpAccept=text/plain"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Holocene environmental changes and paleo-tsunami history in Onuma on the southern part of the Sanriku Coast, northeast Japan"}],"description":[{"notation":[{"@value":"Abstract   After the 2011 Tohoku-oki earthquake that occurred off the Pacific coast, significant problems arose concerning the Pacific coastal area (Sanriku Coast) such as the lack of the historical and paleo-tsunami records and the paradox between long-term and short-term vertical crustal movements. The data necessary to solve the issues are also essential for understanding the mechanisms of tsunami generation and earthquakes and assessing the risk of large, low-frequency disasters. Thus, we conducted excavation and coring surveys and reconstructed the paleoenvironment at Onuma on the southern Sanriku Coast, based on sedimentary facies, age data (radiocarbon dating and tephra), fossils (diatoms and mollusks), and topography. First, we discussed the preservation potential of tsunami deposits considering the geomorphologic and geologic evolution of the study area. Subsequently, we identified tsunami deposits and estimated their occurrence ages and inundation height. We discovered six tsunami beds deposited during ca. 5–1 ka when the preservation potential of tsunami deposits was high in the study site. We divided them into two types of deposits—sand and gravel. These deposits reflect different sources and flow processes of paleo-tsunamis. Therefore, we estimated the heights of the paleo-tsunamis that is 5–10 m for sand tsunami deposits (S1–S3 deposits) and > 10 m for gravel tsunami deposits (G1–G3 deposits). The tsunami deposits were dated at 690–1040 BP (S1), 2240–3310 BP (G1), 3320–3630 BP (G2), 3620–4060 BP (G3), 4030–4400 BP (S2), and 4440–5570 BP (S3). This approach and the setting of the study site enabled us to evaluate not only the ages of paleo-tsunami deposits but also the paleo-tsunami heights. Moreover, we estimated the paleo-sea level between 8 and 7 ka based on the sedimentary facies and paleoenvironment deduced from the fossil shells, and calculated the vertical crustal movement during the Holocene at − 0.4 to − 1.0 mm/yr by comparing with the theoretical relative sea-level curve. This information is significant for reconstructing the tectonic evolution along the subduction zone and for paleogeography to estimate the paleo-tsunami magnitudes."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420282801182155904","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"00736225"},{"@type":"NRID","@value":"1000000736225"},{"@type":"ORCID","@value":"0000-0002-4798-3425"},{"@type":"NRID","@value":"9000248240045"},{"@type":"NRID","@value":"9000014159281"},{"@type":"NRID","@value":"9000413729806"},{"@type":"NRID","@value":"9000020962943"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/ishimura.daisuke"}],"foaf:name":[{"@value":"Daisuke Ishimura"}]},{"@id":"https://cir.nii.ac.jp/crid/1380566394191638400","@type":"Researcher","foaf:name":[{"@value":"Takahiro Miyauchi"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00253227"}],"prism:publicationName":[{"@value":"Marine Geology"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2017-04","prism:volume":"386","prism:startingPage":"126","prism:endingPage":"139"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S0025322717300269?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0025322717300269?httpAccept=text/plain"}],"createdAt":"2017-02-14","modifiedAt":"2019-11-04","project":[{"@id":"https://cir.nii.ac.jp/crid/1040000781895263744","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"16H01829"},{"@type":"JGN","@value":"JP16H01829"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16H01829/"}],"notation":[{"@language":"ja","@value":"高解像度地形データを活用した新たな電子活断層図の作成"},{"@language":"en","@value":"Newly designed digital active fault map using  high-resolution DEM-based geomorphological data"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000781974537600","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"17K18532"},{"@type":"JGN","@value":"JP17K18532"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K18532/"}],"notation":[{"@language":"ja","@value":"高密度掘削試料の総合的解析による津波堆積物の地層対比手法の確立"},{"@language":"en","@value":"Establishment for accurate correlation of tsunami deposit layer, based on dense core sample and comprehensive analysis"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000782282379904","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"26249060"},{"@type":"JGN","@value":"JP26249060"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26249060/"}],"notation":[{"@language":"ja","@value":"海陸複合電磁気観測網による地殻変動準備過程および地下流動の検知・監視技術の開発"},{"@language":"en","@value":"Development of Detection and Monitoring Technique for Crustal Movement Preparation Process and Underground Flow by Sea-Land Integrated Electromagnetic Observation Network"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050585658871539712","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Numerical estimation of a tsunami source at the flexural area of Kuril and Japan Trenches in the fifteenth to seventeenth century based on paleotsunami deposit distributions in northern Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216708904448","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Large submarine landslides in the Japan Trench: A new scenario for additional tsunami generation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216709607680","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Challenges of anticipating the 2011 Tohoku earthquake and tsunami using coastal 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