Sea Level, Storm, or Tsunami: Enigmatic Sand Sheet Deposits in a Sheltered Coastal Embayment from Southeastern New South Wales, Australia

摘要: Abstract An extended period of marine-dominated back-barrier sedimentation, truncated by the deposition two large-volume, laterally extensive sand sheets that extend up to 3 km inland from modern coastline, is present at Minnamurra in southeastern Australia. The are anomalous as they drape entire succession and infill estuary. lower sheet contains mud clasts significant amounts organic matter including coastal dune grasses indicating overwash erosion incorporated material both barrier estuary into deposit. first overlain a poorly developed soil records time break before now infilled system was inundated once more. second covers incorporates number erosional features, such ripped-up clasts, cobbles, organic-rich sand. Along this part coast, large spatially se...