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| Titel: |
Chronology of landscape evolution and soil development in the upper Flinders River area, Queensland, based on isotopic dating of Cainozoic basalts |
| Auteur: |
Coventry, R. J. Stephenson, P. J. Webb, A. W. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 32 (1985) nr. 4 pagina's 433-447 |
| Jaar: |
1985-12 |
| Inhoud: |
Three planation surfaces have been formed by fluvial processes during the Late Cainozoic in the catchment of the upper Flinders River, central N Queensland. The ages of the surfaces have been assessed by reference to associated, isotopically-dated basalt flows of the Sturgeon Volcanic Province. The oldest planation surface, the Denna Plain, carries remnants of a lateritic weathering profile that is considerably older than 6.3 Ma. This plain had developed its major geomorphic characteristics prior to 5.7-5.3 Ma ago since some of its red and yellow earth soils are overlain by basalt flows of that age. The Prairie Plain is set below the Denna Plain and its surface is younger than 5.6 Ma, but formed some time before 3.3 Ma. The youngest planation surface, the Hughenden Plain, is widely developed over northwestern Queensland. Though still being extended, it was essentially established by 1 Ma ago. Existing remnants of the planation surfaces have been little modified by erosional or depositional processes since their formation and most of their soils have been developing since the times of planation. The Flinders River drainage was originally to the S (Lake Eyre catchment), but it was betrunked by a western stream to develop its present course to the Gulf of Carpentaria. This diversion is relatively young and appears to have occurred between 5.5 Ma and 3.3 Ma ago. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 11 gevonden artikelen
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