Extinction events have played a pivotal role in shaping Earth's biological and geological history, often leaving behind distinct markers in sedimentary and fossil records. These events, such as the Permian-Triassic and Cretaceous-Paleogene mass extinctions, are characterized by significant biotic turnover, often triggered by catastrophic phenomena like volcanic eruptions, asteroid impacts, or rapid climate changes. The unique geological and sedimentary framework of the Bengal Basin, Bangladesh, constitutes an important archive with which to reconstruct these events at the regional scale. The paper is about potential geological markers of global extinction events within Bangladesh, focusing aspects of sedimentary sequences, isotopic anomalies, and fossil assemblages. The study examines key formations such as the Gondwana sediments, Sylhet Limestone, and Quaternary deposits, analyzing their potential to preserve evidence of mass extinctions and associated environmental changes. By correlating these markers with global extinction timelines, the research aims to provide new insights into the regional impact of these events, while addressing challenges posed by rapid sedimentation, tectonic activity, and erosion. The findings are very important in showing the need for interdisciplinary approaches and advanced analytical techniques to unearth the geological legacy of extinction events in Bangladesh, offering a foundation for future research on Earth's dynamic history.