Late Quaternary landscape evolution in the Keep River region, northwestern Australia

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dc.contributor.authorWard, IAKen_AU
dc.contributor.authorNanson, GCen_AU
dc.contributor.authorHead, LMen_AU
dc.contributor.authorFullagar, Ren_AU
dc.contributor.authorPrice, DMen_AU
dc.contributor.authorFink, Den_AU
dc.date.accessioned2021-12-16T00:11:41Zen_AU
dc.date.available2021-12-16T00:11:41Zen_AU
dc.date.issued2005-09en_AU
dc.date.statistics2021-11-08en_AU
dc.description.abstractThis paper evaluates the Late Quaternary chronostratigraphic context of archaeological sites in the Keep River region, Northern Territory, Australia. Cosmogenic dating, luminescence dating and sediment characterisation reveal sedimentary processes commencing from erosion of the escarpment and plateaux source through temporary storage in sand sheets, to final deposition in alluvial floodplains. Erosion of the sandstone plateaux (∼5 mm ka−1) and escarpment faces (probably ∼50–100 mm ka−1) provide the main sediment source for the adjacent sand sheets which have evolved over the past 100,000 years as the product of ongoing cycles of accumulation and denudation. The rate of sediment accumulation is lowest near the escarpments on the low-energy sediment-limited sand sheets (<100 mm ka−1) and greatest near the main streams (>400 mm ka−1) that have more numerous sediment sources. Collectively, luminescence ages indicate an apparent increase in sediment accumulation rate in the sand sheets from ∼100 mm ka−1 in the late Pleistocene to over 200 mm ka−1 in the Holocene. This most likely reflects enhanced monsoonal activity following postglacial marine transgression. Palaeosol horizons in the creek profile distinguished by sediment mottling mark potentially significant palaeoenvironmental and palaeoclimatic changes during the Quaternary. © 2004 Elsevier Ltd.en_AU
dc.identifier.citationWard, I. A. K., Nanson, G. C., Head, L. M., Fullagar, R. L. K., Price, D. M., & Fink, D. (2005). Late Quaternary landscape evolution in the Keep River region, northwestern Australia. Quaternary Science Reviews, 24(16–17), 1906-1922. doi:10.1016/j.quascirev.2004.11.004en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.issue16-17en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.pagination1906-1922en_AU
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2004.11.004en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12465en_AU
dc.identifier.volume24en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAustraliaen_AU
dc.subjectNorthern Territoryen_AU
dc.subjectArchaeological sitesen_AU
dc.subjectSedimentsen_AU
dc.subjectErosionen_AU
dc.subjectSanden_AU
dc.subjectAlluvial depositsen_AU
dc.subjectQuaternary perioden_AU
dc.titleLate Quaternary landscape evolution in the Keep River region, northwestern Australiaen_AU
dc.typeJournal Articleen_AU
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