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ANU Radiocarbon Date List VII

  • H A Polach (a1), B G Thom (a1) (a2), G M Bowman (a1) (a2) and Stella Wilkie (a1)

Extract

Along SE coast of Australia a variety of Holocene barriers composed of siliceous sand and shell detritus occur within bedrock-confined embayments. On basis of morphostratigraphy 4 barrier types are recognized: prograded, stationary, receded and episodic transgressive dunes. Several subtypes are also distinguished. Composite bay barriers involving partial eolian reworking of a prograded barrier constitute most complex examples of Holocene depositional sequences on this coast. The present list is a preliminary attempt at defining the age structure of a group of such barriers (excepting receded type). Ages are reported in conventional years bp. Text references to ages and age ranges are environmental effect corrected ages bp* and yr* (as recommended by Stuiver and Polach, 1977), using 450 ± 35 yr as postulated by Gillespie and Polach (in press) in order to relate Australian oceanic environment shells to terrestrial environment wood. δ13C errors, where based on measurement, are always ± 0.2% and are not shown in the text; when based on estimated values (Est) the error is given.

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References

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Bernard, H A, Le Blanc, R J, and Major, C F, 1962, Recent and Pleistocene geology of Southeast Texas, in: Rainwater, E H and Zingula, R P (eds), Geology of the Gulf Coast and Central Texas and guidebook of excursions: Houston, Houston Geol Soc, p 175224.
Bloom, A L, Broecker, W S, Chappell, John, Matthews, R S, and Mesolella, K J, 1974, Quaternary sea level fluctuations on a tectonic coast: new Th230/U234 dates from the Huon Peninsula, New Guinea: Quaternary Research, v 4, p 185205.
Curray, J R, Emmel, F J, and Crampton, P J S, 1969, Holocene history of a strand plain, lagoonal coast, Nayarit, Mexico, in: Lagunas Costeras, un Simposio, Mexico, UNAM-UNESCO, p 61100.
Gillespie, R and Polach, H A, 1977, The suitability of marine shells for radiocarbon dating of Australian prehistory, in: Internatl conf on radiocarbon dating 9th, Proc, Univ California, Los Angeles and San Diego, in press.
Langford-Smith, T and Thom, B G, 1969, Coastal morphology of New South Wales: Geol Soc Australia Jour, v 16, p 572580.
Ly, C K, 1976, Depositional and mineralogical studies of Quaternary sedimentation in the Newcastle-Port Stephens area of New South Wales: unpub PhD thesis, Univ Newcastle, Newcastle, New South Wales, Australia.
Stuiver, M and Polach, H A, 1977, Reporting of 14C data: a discussion: Radiocarbon, v 19, p 358363.
Thom, B G, 1965, Late Quaternary coastal morphology of the Port Stephens-Myall Lakes area, NSW: Royal Soc New South Wales Jour, v 98, p 2336.
Thom, B G, Polach, H A, and Bowman, G M, 1978, Holocene age structure of coastal sand barriers in New South Wales, Australia: Occ monos, Dept Geog, Fac Military Studies, Univ New South Wales, 86 p.

ANU Radiocarbon Date List VII

  • H A Polach (a1), B G Thom (a1) (a2), G M Bowman (a1) (a2) and Stella Wilkie (a1)

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