During the mid-to-late 1960s, bedforms emerged as primary indicators of flow directions and palaeocurrents across coastal environments, with integrated interpretations from bed-sand sequences, cross-lamination patterns, and experimental analogs to reconstruct past hydrodynamics. Experimental and quantitative approaches to turbidity and suspension dynamics—flume studies, shear-stress measurements, and wave-velocity analyses—linked sediment transport to specific flow conditions. Estuarine and coastal transport and deposition patterns revealed how rivers, estuaries, and coastal zones accumulate and relocate sediments through longshore, tidal, and ebb-flood processes, while storm-driven morphodynamics highlighted storms as both constructive and destructive agents shaping coastlines through basal patch patterns and storm-induced deposits. Historical Significance: The period yielded foundational methods for measuring longshore transport and distinguishing depositional environments via grain-size analysis, establishing bedform-based frameworks for interpreting coastal stratigraphy and transport regimes. The introduction of hierarchical bed-form concepts and their orientations provided a quantitative link between bed geometry, transport processes, and downstream stratigraphy, setting a lasting paradigm for coastal sedimentology. Sub-populations within grain-size distributions began to be linked to distinct transport modes, refining texture-based provenance assessments and improving coastal sediment budgets. The emphasis on estuarine fluxes and landward sediment transport in estuaries of the Atlantic Coastal Plain contributed essential insights into estuarine sediment budgets and the drivers of coastal morphodynamics.