This project explores the evolution of modern and ancient carbonate-dominated coastal systems and low-lying, unconsolidated islands, which face increasing threats from sea-level rise, climate change, and human impact. Unlike siliciclastic coasts, carbonate coastal systems are harder to predict due to uncertainties in sediment production, transport, preservation, and accumulation on coastlines. We use an integrated approach—combining fieldwork, geochronology, remote sensing, and coastal numerical modeling—to investigate both carbonate sediment sources and coastal geomorphic sinks. Focusing on Late Pleistocene to Holocene coastal archives, we aim to better understand how these systems have evolved over centuries to millennia. The results will refine predictive models of carbonate coastal responses to future environmental pressures and support high-resolution paleo-coastal reconstructions with direct applications in geoarchaeology and human-environment interaction studies.