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Combining low temperature apatite thermochronology and cosmogenic isotope analysis in quantitative landscape evolution studies. Roderick Brown, Hermione Cockburn, Barry Kohn, David Belton, David Fink, Andrew Gleadow and Michael Summerfield. The University of Melbourne

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Combining low temperature apatite thermochronology and cosmogenic isotope analysis in quantitativelandscape evolution studies

Roderick Brown, Hermione Cockburn, Barry Kohn, David Belton, David Fink, Andrew Gleadow

and Michael Summerfield

The University of Melbourne

Australian Nuclear Science & Technology Organisation

The University of Edinburgh


Conceptual landscape cosmogenic isotope analysis in quantitative

evolution models


van der Beek et al. (2002) cosmogenic isotope analysis in quantitative

Numerical landscape evolution models


Numerical landscape evolution models cosmogenic isotope analysis in quantitative


Numerical landscape evolution models cosmogenic isotope analysis in quantitative


Southern Africa cosmogenic isotope analysis in quantitative


Drakensberg Escarpment cosmogenic isotope analysis in quantitative


Landsat ETM+ 321RGB Image cosmogenic isotope analysis in quantitative


Drakensberg Escarpment, Sani Pass cosmogenic isotope analysis in quantitative


Sani Top cosmogenic isotope analysis in quantitative

Photograph by Alastair Fleming


Apatite Fission Track Age cosmogenic isotope analysis in quantitative


Estimated Palaeogeothermal Gradients cosmogenic isotope analysis in quantitative


Atlantic Margin, Namibia cosmogenic isotope analysis in quantitative


Gamsberg Escarpment, ASTER VNIR Image cosmogenic isotope analysis in quantitative


Gamsberg Plateau, ASTER VNIR Image cosmogenic isotope analysis in quantitative


Photograph by Hermione Cockburn cosmogenic isotope analysis in quantitative

Gamsberg Escarpment


Photograph by Hermione Cockburn cosmogenic isotope analysis in quantitative

Gamsberg Escarpment


Gamsberg Plateau Transect cosmogenic isotope analysis in quantitative


Gamsberg Escarpment Transect cosmogenic isotope analysis in quantitative


South Eastern Australia cosmogenic isotope analysis in quantitative


South Eastern Australia, 300m DEM cosmogenic isotope analysis in quantitative


Brown Mountain Transect cosmogenic isotope analysis in quantitative

50 km


Denudation since 110 Ma cosmogenic isotope analysis in quantitative


Denudation since 65 Ma cosmogenic isotope analysis in quantitative


Apatite U-Th/He Ages cosmogenic isotope analysis in quantitative


Paired Apatite FT & He Ages cosmogenic isotope analysis in quantitative


Apatite FT & U-Th/He Ages cosmogenic isotope analysis in quantitative


Age of continental rifting cosmogenic isotope analysis in quantitative


ANTARES Detector Array, ANSTO, Australia cosmogenic isotope analysis in quantitative


Conclusions cosmogenic isotope analysis in quantitative

Combined thermochronologic and cosmogenic datasets are capable of quantifying passive margin escarpment retreat rates

Measured denudation rates and chronologies for the Gamsberg, Drakensberg and Brown Mountain escarpments are incompatible with a steady, parallel retreat model

A viable alternative model involves the establishment of an escarpment at a major inland drainage divide with moderate to low subsequent retreat rates


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