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Geomorphic evidence for mid-late Holocene higher sea level from southeastern Australia

Journal Article


Abstract


  • An elevated sheltered pocket beach sequence at Batemans Bay, NSW, Australia, composed of shelly fine- to medium-grained sand provides geomorphic evidence of higher than present sea level during the mid-late Holocene. The sequence is composed of a sand facies with variable amounts of shell and contains a number of well-defined dipping reflectors identified in ground penetrating radar (GPR) profiles indicative of a small prograded beach system. This beach succession is overlain by storm or tsunami deposits. The beach deposit accumulated between 2500 and 5000. cal. BP under relatively high energy conditions within a more open immature estuary during a period of higher sea level. Both deposits have been preserved by a low energy mangrove facies that accumulated after the recent fall in sea level cut off ocean wave activity from the area approximately 2000-2500. cal. BP. This beach sequence provides new evidence for a period of higher sea level 1-1.5. m higher than present that lasted until at least c. 2000-2500. cal. BP and adds complementary geomorphic evidence for the mid to late Holocene sea-level highstand previously identified along other parts of the southeast Australian coast using other methods. © 2009 Elsevier Ltd and INQUA.

Authors


  •   Switzer, Adam D. (external author)
  •   Sloss, Craig R. (external author)
  •   Jones, Brian G.
  •   Bristow, C (external author)

Publication Date


  • 2010

Citation


  • Switzer, A. D., Sloss, C. R., Jones, B. G. & Bristow, C. (2010). Geomorphic evidence for mid-late Holocene higher sea level from southeastern Australia. Quaternary International, 221 (1-2), 13-22.

Scopus Eid


  • 2-s2.0-77953704384

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/5058

Number Of Pages


  • 9

Start Page


  • 13

End Page


  • 22

Volume


  • 221

Issue


  • 1-2

Abstract


  • An elevated sheltered pocket beach sequence at Batemans Bay, NSW, Australia, composed of shelly fine- to medium-grained sand provides geomorphic evidence of higher than present sea level during the mid-late Holocene. The sequence is composed of a sand facies with variable amounts of shell and contains a number of well-defined dipping reflectors identified in ground penetrating radar (GPR) profiles indicative of a small prograded beach system. This beach succession is overlain by storm or tsunami deposits. The beach deposit accumulated between 2500 and 5000. cal. BP under relatively high energy conditions within a more open immature estuary during a period of higher sea level. Both deposits have been preserved by a low energy mangrove facies that accumulated after the recent fall in sea level cut off ocean wave activity from the area approximately 2000-2500. cal. BP. This beach sequence provides new evidence for a period of higher sea level 1-1.5. m higher than present that lasted until at least c. 2000-2500. cal. BP and adds complementary geomorphic evidence for the mid to late Holocene sea-level highstand previously identified along other parts of the southeast Australian coast using other methods. © 2009 Elsevier Ltd and INQUA.

Authors


  •   Switzer, Adam D. (external author)
  •   Sloss, Craig R. (external author)
  •   Jones, Brian G.
  •   Bristow, C (external author)

Publication Date


  • 2010

Citation


  • Switzer, A. D., Sloss, C. R., Jones, B. G. & Bristow, C. (2010). Geomorphic evidence for mid-late Holocene higher sea level from southeastern Australia. Quaternary International, 221 (1-2), 13-22.

Scopus Eid


  • 2-s2.0-77953704384

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/5058

Number Of Pages


  • 9

Start Page


  • 13

End Page


  • 22

Volume


  • 221

Issue


  • 1-2