Propagation processes of the submarine jumbled sheet flows and overlying pillow flow from the Middle Miocene Ogi Basalt Member, Sado Island, Japan

Propagation processes of the submarine jumbled sheet flows and overlying pillow flow from the Middle Miocene Ogi Basalt Member, Sado Island, Japan | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Propagation processes of the submarine jumbled sheet flows and overlying pillow flow from the Middle Miocene Ogi Basalt Member, Sado Island, Japan Norie Fujibayashi, James D.L. White, Takatoshi Maruyama, Yosuke Hanma, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6233406/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The propagation styles of jumbled sheet flow and pillow flow are revealed by observations of the internal structures of three composite lava flows and one pillow flow of the Itsubo basaltic andesite unit of the Miocene Ogi Basalt. The composite lava flows are composed ofmassive sheet lavas, pillows, lava lobes and hyaloclastite breccias. The massive sheet lavas are narrow with trough-shaped bases at their upstream ends and continue to the platy sheets at the downstream ends. The sheets have hyaloclastite breccias at the top and have alternation of foreset bedded, pillow piles and lava lobes with lobe-surface breccias and flow foot-breccias at the base. The flow-top breccias and lobe-surface breccias include fluidal clasts formed by deformation of lava surfaces. The flow-foot breccias are fed from the lava lobes and include steeply elongated fluidal clasts fed from the thin layers of pillows as the terminal feet of lava lobes and large amoeboid pillows torn from the lobes. The uppermost pillow flow consists of foreset-bedded pillow chains extending from the top of the flow. Some thick chains indicate large pulses of molten lava supply. Sediment-filled depression observed in the pillow flow may represent a channel emptied by drainage of molten lava into the surrounding pillow chains, leaving thin sheets at the bottom. The composite lava flows and pillow flow of the Itsubo basaltic andesite unit may be ancient analogues of the jumbled sheet flow and inflated pillow flow reported from the 1998 lava flows of Axial Seamount, Juan de Fuca Ridge. Miocene back-arc basin submarine channelized lava flow jumbled sheet flow pillow flow composite lava flow flow-foot breccia Full Text Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6233406","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":433991287,"identity":"596c9265-2224-414f-8648-385c888eed0d","order_by":0,"name":"Norie Fujibayashi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABB0lEQVRIiWNgGAWjYBAC9gaGhMMMFQyMDUB0AEmCDacWngMgLWfgWgyI0sLAzNgG0gIGBjhVIrRIJDw8XDjPRrZBurnx4JeaP/IMEgmMH34w8OXh0ZJweOa2NOMGmYMNh2WOGRg2SCQwS/YwsBXj0mIP0sK77XBig0Riw2EJNgPG/TcSGKSBfklswGcL75z/UC3/DOxBtvwmrKXhAFjLwY9tBkBGAht+W3geJByecSzZuA1kC2OfcXIDz8M2yx4D3H7hYc9J/lxQYyfbL5H++OOPb3K2DezJh2/8qDiGM8SAmhLAFCjqmHnATFAcGRxLwK2F/QCcyfgDIVyDR8soGAWjYBSMMAAAKE9Z7fMlYgEAAAAASUVORK5CYII=","orcid":"https://orcid.org/0009-0000-9714-1077","institution":"Niigata University: Niigata Daigaku","correspondingAuthor":true,"prefix":"","firstName":"Norie","middleName":"","lastName":"Fujibayashi","suffix":""},{"id":433991288,"identity":"740573ca-0744-45a4-b039-786c5ad9182d","order_by":1,"name":"James D.L. 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The composite lava flows are composed ofmassive sheet lavas, pillows, lava lobes and hyaloclastite breccias. The massive sheet lavas are narrow with trough-shaped bases at their upstream ends and continue to the platy sheets at the downstream ends. The sheets have hyaloclastite breccias at the top and have alternation of foreset bedded, pillow piles and lava lobes with lobe-surface breccias and flow foot-breccias at the base. The flow-top breccias and lobe-surface breccias include fluidal clasts formed by deformation of lava surfaces. The flow-foot breccias are fed from the lava lobes and include steeply elongated fluidal clasts fed from the thin layers of pillows as the terminal feet of lava lobes and large amoeboid pillows torn from the lobes. The uppermost pillow flow consists of foreset-bedded pillow chains extending from the top of the flow. Some thick chains indicate large pulses of molten lava supply. Sediment-filled depression observed in the pillow flow may represent a channel emptied by drainage of molten lava into the surrounding pillow chains, leaving thin sheets at the bottom. The composite lava flows and pillow flow of the Itsubo basaltic andesite unit may be ancient analogues of the jumbled sheet flow and inflated pillow flow reported from the 1998 lava flows of Axial Seamount, Juan de Fuca Ridge.","manuscriptTitle":"Propagation processes of the submarine jumbled sheet flows and overlying pillow flow from the Middle Miocene Ogi Basalt Member, Sado Island, Japan","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-04-02 10:44:13","doi":"10.21203/rs.3.rs-6233406/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"59fe5009-42ad-4c22-9073-19bb04eabc07","owner":[],"postedDate":"April 2nd, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2025-07-25T15:48:03+00:00","versionOfRecord":[],"versionCreatedAt":"2025-04-02 10:44:13","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6233406","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6233406","identity":"rs-6233406","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}