Integrated Stratigraphic Correlation of Silurian Marine Platforms

The Silurian Period represents a critical interval of post-Ordovician recovery, marked by marine transgressions, biotic diversification, and stabilization of global carbonate platform systems. This study presents an integrated stratigraphic framework for correlating Silurian marine platforms through the combined application of biostratigraphy, chemostratigraphy, sequence stratigraphy, and lithostratigraphic analysis. By synthesizing graptolite and conodont zonations with carbon isotope stratigraphy and facies architecture, a high-resolution correlation model is developed for shallow- to deep-marine successions across multiple paleogeographic regions. Silurian carbonate platforms developed extensively along the margins of Laurentia, Baltica, and South China, reflecting tectonic stabilization following the Caledonian orogeny. Recurrent eustatic sea-level fluctuations influenced platform progradation, reef growth, and basinal sedimentation. Carbon isotope excursions, particularly during the Llandovery–Wenlock and Ludlow intervals, provide valuable chronostratigraphic markers that enhance global correlation beyond facies-controlled fossil assemblages.