Carbon-14 Dates from the Snowy Mountains area, Southeastern Australia, and their Interpretation

Costin, A. B.

doi:10.1016/0033-5894(72)90092-0

Cited by 69 publications

(59 citation statements)

References 10 publications

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“…van Dijk, 1959;Walker, 1962;Coventry and Walker, 1977;Prosser et al, 1994). It has also been shown that periglacial processes, thought to be more erosive than processes under milder climates, occurred in the southeastern highlands during the last glacial cycle (Galloway, 1965;Caine and Jennings, 1968;Costin and Polach, 1971;Costin, 1972), and presumably similar processes were active in previous glacial periods.…”

Section: Southeastern Australia Settingmentioning

confidence: 99%

Late Quaternary erosion in southeastern Australia: a field example using cosmogenic nuclides

Heimsath

Chappell

Dietrich

et al. 2001

Quaternary International

174

180

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Late Quaternary rates of apparent soil production, bedrock incision, and average erosion are determined for the southeastern highlands of Australia using in situ produced cosmogenic nuclide concentrations of 10 Be and 26 Al. Apparent soil production rates define a steep, inverse exponential function of soil depth with a maximum of 143 m Ma À1 under zero soil depth. There were no observed soil depths between about 25 cm and zero, however, such that the maximum observed rate is about 50 m Ma À1. The Bredbo River catchment average erosion rate is 1571 m Ma À1 , and is similar to the average hillslope erosion rate of 1671 m Ma À1 . Bedrock incision rates average 9 m Ma À1 and suggest that the higher rates of hillslope erosion may be in response to a pulse of incision, perhaps generated by knickpoint propagation. Bedrock erosion rates inferred from a tor profile average 3.8 m Ma À1 , with higher rates on other, more weathered tor tops. An aboveground tor profile of nuclide concentrations is consistent with a simple model of rapid stripping of the surrounding saprolite, supporting the view that at least one episodic period of increased denudation has affected the landscape evolution of the highlands. We test this hypothesis by using a simple landscape evolution model to reasonably predict the spatial variation of soil depth as well as the emergence of tors. r

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Section: Southeastern Australia Settingmentioning

confidence: 99%

Late Quaternary erosion in southeastern Australia: a field example using cosmogenic nuclides

Heimsath

Chappell

Dietrich

et al. 2001

Quaternary International

174

180

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“…This is of significance in the context of this study because industrial metals are enriched in dusts (Marx et al, 2008;Marx et al, 2014b), implying that high concentrations of industrial metals may be present in the soils of the Snowy Mountains. Vegetation above the tree line consists of alpine herb fields and heath, with ombrotrophic Sphagmun peat mires blanketing extensive areas (Costin, 1972;Martin, 1999). Below the treeline vegetation consists largely of Snowgum (Eucalyptus pauciflora)…”

Section: Physical Settingmentioning

confidence: 99%

A landscape-scale approach to examining the fate of atmospherically derived industrial metals in the surficial environment

Stromsoe

Marx

McGowan

et al. 2015

Science of The Total Environment

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Industrial metals are now ubiquitous within the atmosphere and their deposition represents a potential source of contamination to surficial environments. Few studies, however, have examined the environmental fate of atmospheric industrial metals within different surface environments. In this study, patterns of accumulation of atmospherically transported industrial metals were investigated within the surface environments of the Snowy Mountains, Australia. Metals, including Pb, Sb, Cr and Mo, were enriched in aerosols collected in the Snowy Mountains by 3.5-50 times pre-industrial concentrations. In sedimentary environments (soils, lakes and reservoirs) metals showed varying degrees of enrichment. Differences were attributed to the relative degree of atmospheric input, metal sensitivity to enrichment, catchment area and metal behaviour following deposition. In settings where atmospheric deposition dominated (ombrotrophic peat mires in the upper parts of catchments), metal enrichment patterns most closely resembled those in collected aerosols. However, even in these environments significant dilution (by 5-7 times) occurred. The most sensitive industrial metals (those with the lowest natural concentration; Cd, Ag, Sb and Mo) were enriched throughout the studied environments. However, in alpine tarn-lakes no other metals were enriched, due to the dilution of pollutantmetals by catchment derived sediment. In reservoirs, which were located lower within catchments, industrial metals exhibited more complex patterns. Particle reactive metals (e.g. Pb) displayed little enrichment, implying that they were retained up catchment, whereas more soluble metals (e.g., Cu and Zn) showed evidence of concentration. These same metals (Cu and Zn) were depleted in soils, implying that they are preferentially transported through catchments. Enrichment of other metals (e.g. Cd) varied between reservoirs as a function of contributing catchment area. Overall this study showed that the fate of atmospherically derived metals is complex, and depends upon metal behaviour and geomorphic processes operating at landscape scales. Disciplines Medicine and Health Sciences | Social and Behavioral Sciences Publication DetailsStromsoe, N., Marx, S. K., McGowan, H. A., Callow, N., Heijnis, H. & Zawadzki, A. (2015). A landscape-scale approach to examining the fate of atmospherically derived industrial metals in the surficial environment. However, in alpine tarn-lakes no other metals were enriched, due to the dilution of pollutantmetals by catchment derived sediment. In reservoirs, which were located lower within catchments, industrial metals exhibited more complex patterns. Particle reactive metals (e.g. Pb) displayed little enrichment, implying they were retained up catchment, whereas more soluble metals (e.g., Cu and Zn) showed evidence of concentration. These same metals (Cu and Zn) were depleted in soils, implying they are preferentially transported through catchments. Enrichment of other metals (e.g. Cd) varied between reservoirs as a funct...

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“…C'est ce que tendent à dé-montrer les travaux de BENEDICT (1966BENEDICT ( , 1970BENEDICT ( , 1976 au Colorado, PRICE (1970 au Yukon, COSTIN er a/. (1967( ) et COSTIN (1972 en Australie, SCHWAN et al (1982) au Danemark, WHITE et MOTTERSHEAD (1973) en Ecosse, BACHMANN et FURRER (1971) dans les Alpes suisses, WORSLEY et HARRIS (1974) ainsi qu'ELLIS (1979) en Norvège; la question a aussi été abordée par PAYETTE et LAJEUNESSE (1980) au Nouveau-Québec. La plupart d'entre eux ont noté que les sols fossiles enfouis par la solifluxion, fixant l'âge limite des glissements, dataient souvent de périodes climatiques froides (à l'échelle de l'Holocène).…”

Section: Introductionunclassified

Analyse stratigraphique d’un lobe de gélifluxion des Torngats Centrales, Labrador

Vernal¹,

Mathieu²,

Gangloff³

2007

gpq

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RÉSUMÉUne coupe dans un lobe de gélifluxion de la vallée de Nakvak (Torngats centrales) expose une succession de dia-mictons et de sols fossiles. Les âges 14C de trois des sols enfouis présentent une inversion (de bas en haut: 1575 ± 76 BP; 1350 ±90 BP; 2450 ± 380 BP). Les spectres polliniques de la coupe n'offrent aucune palynostratigraphie contrastée. Cependant, des variations majeures dans les concentrations polliniques semblent refléter, pour chacun des sols, la durée de la pédogenèse ainsi qu'une infiltration du pollen dans l'horizon minéral sous-jacent. Les âges des sols fossiles situent les périodes de gélifluxion durant les phases de refroidissements climatiques déjà proposées pour la région.

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Carbon-14 Dates from the Snowy Mountains area, Southeastern Australia, and their Interpretation

Cited by 69 publications

References 10 publications

Late Quaternary erosion in southeastern Australia: a field example using cosmogenic nuclides

Late Quaternary erosion in southeastern Australia: a field example using cosmogenic nuclides

A landscape-scale approach to examining the fate of atmospherically derived industrial metals in the surficial environment

Analyse stratigraphique d’un lobe de gélifluxion des Torngats Centrales, Labrador

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