|
| << vorige | volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 9 van 18 gevonden artikelen
| Titel: |
Late Pleistocene colluvial deposits in central Tanzania; erosional response to climatic change? |
| Auteur: |
Eriksson, Mats G. Olley, Jon M. Payton, Robert W. |
| Verschenen in: |
GFF |
| Paginering: | Jaargang 121 (1999) nr. 3 pagina's 198-201 |
| Jaar: |
1999-09-01 |
| Inhoud: |
Two major colluvial deposits have been identified on the slopes of the Irangi Hills in north central Tanzania. The oldest of these occurs in shallow depressions on the pediment slopes. The time of deposition has been dated by the use of optical stimulated luminescence (OSL) dating techniques to Late Pleistocene. The OSL dates were 14,700 pm 1600, 14,200 pm 1500, and 11,400 pm 1300 years. In Late Pleistocene time the climate changed from dry to wet conditions throughout much of the tropics and this time period is frequently reported as a period characterised by enhanced soil erosion. It is likely that the older colluvial unit in the Irangi Hills was formed as a result of climatic change when rainfall increased ahead of a vegetation change and thereby provided conditions favourable for soil erosion. The younger colluvial unit yielded deposition ages of 400-600 years and is part of a number of successive erosion and deposition periods during the last millenium, probably as a result of anthropogenic impact on the landscape. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 9 van 18 gevonden artikelen
| << vorige | volgende >> |