Use of Rock Weathering-Rind Thickness for Holocene Absolute Age-Dating in New Zealand

1981 ◽  
Vol 13 (1) ◽  
pp. 33 ◽  
Author(s):  
T. J. H. Chinn
Keyword(s):  
New Zealand ◽  
Age Dating ◽  
Rock Weathering ◽  
Absolute Age

A late Quaternary moraine sequence dated by rock weathering rinds, Craigieburn Range, New Zealand

1993 ◽  
Vol 30 (9) ◽  
pp. 1861-1869 ◽  
Author(s):  
K. E. Ricker ◽  
T. J. Chinn ◽  
M. J. McSaveney
Keyword(s):  
New Zealand ◽  
Oxygen Isotope ◽  
Late Quaternary ◽  
Rock Weathering ◽  
Radiocarbon Dates ◽  
Oxygen Isotope Record ◽  
Isotope Record

Basins draining the Craigieburn Range, New Zealand, preserve a nearly complete late Quaternary moraine sequence. There are no radiocarbon dates, but moraine ages were determined by weathering-rind dating using thicknesses of rinds on surface-exposed sandstone boulders. Periods of expanded glaciers occurred 0.53, 0.66–2.5, 2.8–4.2, 5.9–9.7, and 16 thousand calendar (sidereal) years ago. Earlier periods of expanded glaciers in the region are dated by inference, largely from the ocean oxygen-isotope record, at 21–23.3, 25.5, and 56–70 ka.

PLAYING THE DATING GAME IN LAB: RELATIVE AND ABSOLUTE AGE DATING IN AN EARTH AND SPACE SCIENCE LAB DESIGNED FOR PRE-SERVICE ELEMENTARY TEACHERS

2018 ◽  
Author(s):  
Theresa Halligan ◽  
◽  
Cinzia Cervato ◽  
Charles Kerton ◽  
Diana L. Thatcher ◽  
...  
Keyword(s):  
Elementary Teachers ◽  
Space Science ◽  
Age Dating ◽  
Absolute Age

NEW AMS 14C DATES OF A MULTICULTURAL ARCHAEOLOGICAL SITE FROM THE PALEO-DELTAIC REGION OF WEST BENGAL, INDIA: CULTURAL AND GEO-ARCHAEOLOGICAL IMPLICATIONS

Radiocarbon ◽  
2021 ◽  
pp. 1-11
Author(s):  
Nabanita Naskar ◽  
Kaushik Gangopadhyay ◽  
Susanta Lahiri ◽  
Punarbasu Chaudhuri ◽  
Rajveer Sharma ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Late Holocene ◽  
West Bengal ◽  
Archaeological Site ◽  
Humid Tropics ◽  
Age Dating ◽  
New Delhi ◽  
Absolute Age ◽  
Calendar Dates

ABSTRACT This study is on the absolute age dating of a multicultural site of Erenda, East Medinipur district, in coastal West Bengal, India. Charcoal samples were collected and measured using the accelerator mass spectrometry (AMS) facility at the Inter-University Accelerator Centre, New Delhi, India. These samples were collected from secured stratigraphic context of two excavated trenches. A careful collection of samples from two trenches provided us with the first calendar dates, 950 BCE and 1979 BCE, of protohistoric sites in coastal West Bengal. These calibrated calendar dates not only have wider significance in terms of archaeology but also methodological implications to understand the relevance of application of AMS from the dynamic coastal landscape in the humid tropics during the late Holocene period.

scholarly journals Age constraints of rock glaciers in the Southern Alps/New Zealand – Exploring their palaeoclimatic potential

The Holocene ◽  
2018 ◽  
Vol 28 (5) ◽  
pp. 778-790 ◽  
Author(s):  
Stefan Winkler ◽  
Christophe Lambiel
Keyword(s):  
New Zealand ◽  
Southern Alps ◽  
Early Holocene ◽  
Age Dating ◽  
Schmidt Hammer ◽  
Rock Glacier ◽  
Glacier Surface ◽  
The Holocene ◽  
Exposure Age ◽  
Rock Glaciers

Two rock glaciers in the valley head of Irishman Stream in the central Ben Ohau Range, Southern Alps/New Zealand, have been investigated using the electronic Schmidt-hammer (SilverSchmidt). Longitudinal profiles on both features reveal a consistent trend of decreasing R(Rebound)-values and, hence, increasing weathering intensity and surface-exposure age on their numerous transverse surface ridges from rooting zone towards the front. Previously published numerical ages obtained by terrestrial cosmogenic nuclide dating (TCND) allowed the calculation of a local Schmidt-hammer exposure-age dating (SHD) age-calibration curve by serving as the required fixed points. Age estimates for the lowermost rock glacier surface ridges fall within the early Holocene between 12 and 10.5 ka and indicate a fast disappearance of the Late Glacial glacier formerly occupying the valley head, followed by the initiation of rock glacier formation around or shortly after the onset of the Holocene. Although it cannot be judged whether the rock glaciers investigated were active within the entire Holocene or only repeatedly during multiple episodes within, their location and intact morphology exclude any substantial glacial activity at Irishman Stream during the Holocene. This has considerable regional palaeoclimatic implications because it opens for the hypothesis that climatic conditions during early Holocene were possibly comparatively dry and favourable for rock glacier initiation, but less so for glaciers. It would also challenge the view that air temperature is the sole major climate driver of glacier variability in the Southern Alps. More work utilising the palaeoclimatic potential of rock glaciers in the Southern Alps is advised.

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