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A high-resolution record of vegetation and climate through the last glacial cycle from Caledonia Fen, southeastern highlands of Australia

Journal Article


Abstract


  • A blocked tributary has provided a rare site of long-term sediment accumulation in

    montane southeastern Australia. This site has yielded a continuous, detailed pollen record through the

    last ca. 140 000 years and revealed marked vegetation and environmental changes at orbital to

    sub-millennial scales. Radiocarbon and optically stimulated luminescence (OSL, or optical) ages

    provide some chronological control for the last ca. 70 000 years. Most of the sediment is inorganic but

    with well preserved pollen that accumulated under unproductive and probably largely ice-covered

    lake conditions. The lake was surrounded by low-growing plants with an alpine character. Exceptions

    include three discrete periods of high organic sedimentation in the basin and forest development in

    the surrounding catchment. The two major periods of forest expansion are related to the last

    interglacial and the Holocene, with the third, shorter period considered to represent an interstadial

    in the early part of Marine Isotope Stage (MIS) 3. The latter part of the last glacial period is

    characterised by abrupt sub-millennial, amelioration events that may relate to documented global

    oscillations emanating from the North Atlantic. There are systematic changes through the record that

    can be partly attributed to basin infilling but the progressive reduction and regional extinction of some

    plant taxa is attributed to a long-term trend towards climatic drying. Copyright#2007 John Wiley &

    Sons, Ltd.

UOW Authors


  •   Kershaw, A (external author)
  •   McKenzie, G M. (external author)
  •   Porch, N (external author)
  •   Roberts, Richard
  •   Browne, J L. (external author)
  •   Heijnis, Henk (external author)
  •   Orr, M L. (external author)
  •   Jacobsen, Geraldine (external author)
  •   Newall, P R. (external author)

Publication Date


  • 2007

Citation


  • Kershaw, A. Peter., McKenzie, G. M., Porch, N., Roberts, R. G., Browne, J., Heijnis, H., Orr, M. L., Jacobsen, G. & Newall, P. R. (2007). A high-resolution record of vegetation and climate through the last glacial cycle from Caledonia Fen, southeastern highlands of Australia. Journal of Quaternary Science, 22 (5), 481-500.

Scopus Eid


  • 2-s2.0-34250865561

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/1225

Number Of Pages


  • 19

Start Page


  • 481

End Page


  • 500

Volume


  • 22

Issue


  • 5

Abstract


  • A blocked tributary has provided a rare site of long-term sediment accumulation in

    montane southeastern Australia. This site has yielded a continuous, detailed pollen record through the

    last ca. 140 000 years and revealed marked vegetation and environmental changes at orbital to

    sub-millennial scales. Radiocarbon and optically stimulated luminescence (OSL, or optical) ages

    provide some chronological control for the last ca. 70 000 years. Most of the sediment is inorganic but

    with well preserved pollen that accumulated under unproductive and probably largely ice-covered

    lake conditions. The lake was surrounded by low-growing plants with an alpine character. Exceptions

    include three discrete periods of high organic sedimentation in the basin and forest development in

    the surrounding catchment. The two major periods of forest expansion are related to the last

    interglacial and the Holocene, with the third, shorter period considered to represent an interstadial

    in the early part of Marine Isotope Stage (MIS) 3. The latter part of the last glacial period is

    characterised by abrupt sub-millennial, amelioration events that may relate to documented global

    oscillations emanating from the North Atlantic. There are systematic changes through the record that

    can be partly attributed to basin infilling but the progressive reduction and regional extinction of some

    plant taxa is attributed to a long-term trend towards climatic drying. Copyright#2007 John Wiley &

    Sons, Ltd.

UOW Authors


  •   Kershaw, A (external author)
  •   McKenzie, G M. (external author)
  •   Porch, N (external author)
  •   Roberts, Richard
  •   Browne, J L. (external author)
  •   Heijnis, Henk (external author)
  •   Orr, M L. (external author)
  •   Jacobsen, Geraldine (external author)
  •   Newall, P R. (external author)

Publication Date


  • 2007

Citation


  • Kershaw, A. Peter., McKenzie, G. M., Porch, N., Roberts, R. G., Browne, J., Heijnis, H., Orr, M. L., Jacobsen, G. & Newall, P. R. (2007). A high-resolution record of vegetation and climate through the last glacial cycle from Caledonia Fen, southeastern highlands of Australia. Journal of Quaternary Science, 22 (5), 481-500.

Scopus Eid


  • 2-s2.0-34250865561

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/1225

Number Of Pages


  • 19

Start Page


  • 481

End Page


  • 500

Volume


  • 22

Issue


  • 5