The presence of volcanic glass in soils on the West Coast, South Island, New Zealand

Robertson, S.M.; Mew, G.

doi:10.1080/00288306.1982.10421515

Cited by 18 publications

(10 citation statements)

References 3 publications

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“…Although micro-tephra analyses (e.g. Robertson & Mew, 1982;Hogg & McCraw, 1983;Eden, Froggatt & McIntosh, 1992;Giles et al in press;Newnham & Alloway, unpubl. ) and detection of invisible tephra by X-ray analysis (Lowe, Hogg & Hendy, 1981) have been reported previously in New Zealand, typically they have been considered of limited value due to the abundance of widely dispersed macroscopic tephra layers in the New Zealand environment.…”

Section: Pollen Profiles Containing Kaharoa Tephramentioning

confidence: 98%

The Kaharoa Tephra as a Critical Datum for Earliest Human Impact in Northern New Zealand

Newnham

Lowe

McGlone

et al. 1998

Journal of Archaeological Science

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Section: Pollen Profiles Containing Kaharoa Tephramentioning

confidence: 98%

The Kaharoa Tephra as a Critical Datum for Earliest Human Impact in Northern New Zealand

Newnham

Lowe

McGlone

et al. 1998

Journal of Archaeological Science

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“…These deposits provide an unequivocal chronostratigraphic marker for the LGM which can be applied considerable distances from the source (Campbell, 1986;Pillans et al, 1993). It is the most widespread Late Quaternary tephra layer in the New Zealand region and the only Quaternary tephra layer previously recorded in Westland (Robertson and Mew, 1982;Mew et al, 1986Mew et al, , 1988Almond, 1996;Almond et al, 2001). No other macroscopic tephra layer has been observed at the study sites.…”

Section: Kawakawa Tephramentioning

confidence: 99%

Test of AMS ¹⁴C dating of pollen concentrates using tephrochronology

Newnham¹,

Vandergoes²,

Garnett³

et al. 2006

J Quaternary Science

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Previous attempts to radiocarbon date sediments >10 kyr from the high rainfall region of Westland, New Zealand, a critical location for investigation of interhemispheric patterns of climate change, have been problematic. This study, building on recent work by Vandergoes and Prior (2003), shows that AMS 14 C dating of pollen concentrates has potential to provide more reliable ages than other sediment constituents, including plant macrofossils. The method was applied to sediments from three sites containing the 22.6k 14 C yr Kawakawa Tephra, which provided an independent test of the 14 C ages. Although some minor laboratory contamination was detected in tests on background standards, the modelled relationship between sample mass and measured 14 C content permitted an appropriate correction to be determined. Improved pollen concentrations derived by density separation between 1.4 and 1.2 specific gravity and sieving in the range 10-50 mm provided either older ages than other fractions of the same sample or, where in situ contamination was not evident, equivalent ages. Differences in degree of in situ contamination between depositional environments indicated that, in Westland, lake sites may be less susceptible to contamination by younger carbon than peat sites, where this process may be facilitated by root penetration into underlying sediments.

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“…Preservation of the Kawakawa Tephra in this seetion is loeally eontrolled, and widespread surveys of both soil and loess sections (Young 1967;Robertson & Mew 1982) have not identified diserete tephra layers in the Grey River valley.…”

Section: Stratigraphy and Chronologymentioning

confidence: 99%

An occurrence of Kawakawa Tephra from the Grey River valley, South Island, New Zealand

Mew¹,

Hunt²,

Froggatt

et al. 1986

New Zealand Journal of Geology and Geophysics

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A new locality for Kawakawa Tephra from Graham Terrace, near Nelson Creek in the Grey River valley, South Island, is described. The tephra occurs in loess and is c1early visible as a macroscopic layer where the loess is thickest (about 130 cm) close to the presumed loess sourceat Nelson Creek, to the north and east. Variable tephra thickness (up to 8 cm), lack of layering within the tephra, and inc1usion of locally derived minerals are thought to indicate slight reworking.Electron microprobe and X-ray fluorescence analyses of glass separated from the tephra show that it is chemically indistinguishable from samples of Kawakawa Tephra elsewhere.The tephra represents a datum plane of about 20 000 years RP. Location and recognition of Kawakawa Tephra allows Graham Terrace loess to

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The presence of volcanic glass in soils on the West Coast, South Island, New Zealand

Cited by 18 publications

References 3 publications

The Kaharoa Tephra as a Critical Datum for Earliest Human Impact in Northern New Zealand

The Kaharoa Tephra as a Critical Datum for Earliest Human Impact in Northern New Zealand

Test of AMS ¹⁴C dating of pollen concentrates using tephrochronology

An occurrence of Kawakawa Tephra from the Grey River valley, South Island, New Zealand

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The presence of volcanic glass in soils on the West Coast, South Island, New Zealand

Cited by 18 publications

References 3 publications

The Kaharoa Tephra as a Critical Datum for Earliest Human Impact in Northern New Zealand

The Kaharoa Tephra as a Critical Datum for Earliest Human Impact in Northern New Zealand

Test of AMS 14C dating of pollen concentrates using tephrochronology

An occurrence of Kawakawa Tephra from the Grey River valley, South Island, New Zealand

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Product

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Test of AMS ¹⁴C dating of pollen concentrates using tephrochronology