{"@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/1362262944516541696.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.quaint.2011.08.030"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S1040618211004903?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S1040618211004903?httpAccept=text/plain"}}],"dc:title":[{"@value":"Revised stratigraphy of Holocene tephras on Ulleung Island, South Korea, and possible correlatives for the U-Oki tephra"}],"description":[{"notation":[{"@value":"Abstract   Detailed field surveys and measurements of major oxide compositions of volcanic glass shards, using electron microprobe analyses, revealed the stratigraphy of Holocene tephras U-4, U-3, and U-2 on Ulleung Island, South Korea. The bubble-wall-type glass shards of Kikai-Akahoya (K-Ah) tephra, detected in soil intercalated with tephra layers, indicate that the depositional horizon of the tephra is situated between the U-3 and U-2 tephras. This study has established a revised stratigraphy, in ascending order, of U-4, U-3, K-Ah, and U-2 tephras. Comparisons of the major chemical compositions and eruption ages of the U-4 and U-3 tephras on Ulleung Island and those of Ulleung tephras detected in and around the Japanese Islands suggest that these tephras are distributed widely and potentially can serve as useful and important time markers of the early to middle Holocene. Radiocarbon dates and stratigraphic relationships between the K-Ah and Ulleung tephras on the island suggest that the Ulleung-Oki tephra (U-Oki), which has been used as an essential time marker of the early Holocene, is most likely correlated with the U-4 tephra. Therefore, detailed analyses of chemical compositions of glass shards with dating of these tephras are necessary to identify U-Oki in and around Japanese Islands."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382262944516541701","@type":"Researcher","foaf:name":[{"@value":"Miki Shiihara"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944516541697","@type":"Researcher","foaf:name":[{"@value":"Masayuki Torii"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944516541702","@type":"Researcher","foaf:name":[{"@value":"Mitsuru Okuno"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944516541824","@type":"Researcher","foaf:name":[{"@value":"Hanako Domitsu"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944516541698","@type":"Researcher","foaf:name":[{"@value":"Toshio Nakamura"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944516541696","@type":"Researcher","foaf:name":[{"@value":"Kyu-Han Kim"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944516541699","@type":"Researcher","foaf:name":[{"@value":"Hiroshi Moriwaki"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944516541700","@type":"Researcher","foaf:name":[{"@value":"Motoyoshi Oda"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"10406182"}],"prism:publicationName":[{"@value":"Quaternary International"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2011-12","prism:volume":"246","prism:number":"1-2","prism:startingPage":"222","prism:endingPage":"232"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S1040618211004903?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S1040618211004903?httpAccept=text/plain"}],"createdAt":"2011-08-29","modifiedAt":"2018-11-30","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360283691114260096","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Integrating the Holocene tephrostratigraphy for East Asia using a high-resolution cryptotephra study from Lake Suigetsu (SG14 core), central Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283691180784512","@type":"Article","resourceType":"学術雑誌論文(journal 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tephrastratigraphy in the off Wakasa Bay sediment cores and correlation with widespread tephras"},{"@language":"ja","@value":"若狭湾沖海底堆積物コアに挟まる後期更新世から完新世テフラの層序と広域テフラとの対比"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282763129469824","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Correlation between Alkaline Tephra (Hm-2 Tephra) Distributed on Hakusan Volcano, Central Japan and Tephras on Ulleung Island Based on Major Element Compositions and <sup>14</sup>C Ages"},{"@language":"ja","@value":"主成分化学組成と<sup>14</sup>C年代による白山火山に産出するアルカリ岩質テフラ（Hm-2テフラ）と鬱陵島テフラとの対比"},{"@value":"主成分化学組成と¹⁴C年代による白山火山に産出するアルカリ岩質テフラ(Hm-2テフラ)と鬱陵島テフラとの対比"},{"@language":"ja-Kana","@value":"シュセイブン カガク ソセイ ト ¹ ⁴ C ネンダイ ニ ヨル ハクサン カザン ニ サンシュツ スル アルカリガンシツ テフラ(Hm-2 テフラ)ト ウツリョウトウ テフラ ト ノ タイヒ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390564238083277312","@type":"Article","resourceType":"学術雑誌論文(journal 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