Fig. 3: Lithostratigraphy and chronology of sand dikes.
From: Cascading hazards of a major Bengal basin earthquake and abrupt avulsion of the Ganges River
a Depiction of shallow lithostratigraphy, features, and location and results of OSL dating of sand dike features and intruded sediment. The OSL ages are stratigraphically consistent and constrain overbank deposition to ~2.6–2.5 ka, contemporaneous with the activity of the adjacent river channel (Fig. 2a). b Deep lithostratigraphy obtained from tube-well drilling shows a mud-confined sand at ~0–20 m elevation overlying Pleistocene-aged sands. c, d ~20–40 cm-wide sand dikes bisect the floodplain cap exposed along the pond walls.
