Figure 3. Interpreted stratigraphy of Rhode Island Sound from O'Hara and Oldale (1980). Acoustic units include: PzZ - Proterozoic to Paleozoic bedrock, Ku - Cretaceous coastal plain sediments, Qdo - Wisconsin glacial drift deposits, Qdm - Buzzards Bay moraine deposits, Qfe - Holocene fluvial and estuarine deposits, and Qm - Holocene quiet-water marine deposits. Boundaries are dashed where inferred. Vertical exaggeration: 40X. Location of stratigraphy profile shown as A-A' in figure 1.