Cyclic deposition in a Frasnian heterozoan-dominated restricted ramp (Devonian Lublin Basin, SE-Poland)

Cyclic deposition in a Frasnian heterozoan-dominated restricted ramp (Devonian Lublin Basin, SE-Poland) | 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 Cyclic deposition in a Frasnian heterozoan-dominated restricted ramp (Devonian Lublin Basin, SE-Poland) Marek Narkiewicz, Katarzyna Narkiewicz, Jacek Grabowski This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7544645/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 20 Jan, 2026 Read the published version in Facies → Version 1 posted 5 You are reading this latest preprint version Abstract The Modryń Ramp is a rare Frasnian example of a tropical, shallow-water, heterozoan-dominated carbonate depositional system. It is unique due to its partly restricted cyclic sedimentation, characterized by recurring hypoxic and high-salinity conditions in the distal and central ramp zones. Its development has been reconstructed based on a continuous, fully-cored borehole profile Korczmin IG 1 (SE Poland). The chronostratigraphy was established using both archival and new conodont data, which made it possible to correlate most of the low-frequency regional transgressive-regressive cycles with Frasnian eustatic sea-level changes. Saw-cut cores, thin sections, wireline logs, magnetic susceptibility, and TOC data were instrumental in analyzing metre-scale cyclicity patterns characterizing the succession of facies zones, from distal to central and proximal ramp areas. Mid-Frasnian central and proximal ramp cycles are attributed mainly to tectonic controls, whereas lower and upper Frasnian distal ramp cyclicity was likely driven by astronomically forced glacio-eustasy modified by autocyclic processes. homoclinal ramp hypoxia eustatic changes metre-scale cyclicity tectonism Full Text Supplementary Files OnlineResource1.xls OnlineResource2.pdf Cite Share Download PDF Status: Published Journal Publication published 20 Jan, 2026 Read the published version in Facies → Version 1 posted Editorial decision: Moderate Revision 24 Oct, 2025 Reviewers agreed at journal 23 Sep, 2025 Reviewers invited by journal 14 Sep, 2025 Editor assigned by journal 08 Sep, 2025 First submitted to journal 05 Sep, 2025 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. 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