Global cooling intiated stony deserts in central Australia 2-4 Ma, dated by cosmogenic 21Ne-10Be

Toshiyuki Fujioka; John Chappell; Masahiko Honda; Igor Yatsevich; Keith Fifield; Derek Fabel

doi:10.1130/G21746.1

Global cooling intiated stony deserts in central Australia 2-4 Ma, dated by cosmogenic ²¹Ne-¹⁰Be

Toshiyuki Fujioka^*, John Chappell, Masahiko Honda, Igor Yatsevich, Keith Fifield, Derek Fabel

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

141 Citations (Scopus)

Abstract

Stony deserts are durable indicators of aridity but until now have not been directly dated. Using ²¹Ne and ¹⁰Be produced in surface rocks by cosmic rays, we show that Australian stony deserts formed 2-4 Ma, at the time when global cooling initiated the Quaternary ice ages and intensified aridity-induced major landscape changes in central Australia. This is the first direct determination of stony desert ages, using a new method for determining cosmogenic ²¹Ne in the presence of various neon components from other sources.

Original language	English
Pages (from-to)	993-996
Number of pages	4
Journal	Geology
Volume	33
Issue number	12
DOIs	https://doi.org/10.1130/G21746.1
Publication status	Published - Dec 2005

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abstract = "Stony deserts are durable indicators of aridity but until now have not been directly dated. Using 21Ne and 10Be produced in surface rocks by cosmic rays, we show that Australian stony deserts formed 2-4 Ma, at the time when global cooling initiated the Quaternary ice ages and intensified aridity-induced major landscape changes in central Australia. This is the first direct determination of stony desert ages, using a new method for determining cosmogenic 21Ne in the presence of various neon components from other sources.",

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AU - Yatsevich, Igor

AU - Fifield, Keith

AU - Fabel, Derek

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AB - Stony deserts are durable indicators of aridity but until now have not been directly dated. Using 21Ne and 10Be produced in surface rocks by cosmic rays, we show that Australian stony deserts formed 2-4 Ma, at the time when global cooling initiated the Quaternary ice ages and intensified aridity-induced major landscape changes in central Australia. This is the first direct determination of stony desert ages, using a new method for determining cosmogenic 21Ne in the presence of various neon components from other sources.

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KW - Exposure age

KW - Late Cenozoic

KW - Silcrete

KW - Stony deserts

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ER -

Global cooling intiated stony deserts in central Australia 2-4 Ma, dated by cosmogenic ²¹Ne-¹⁰Be

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