HR: 1340h
AN: T23C-0565    [Abstracts]
TI: River Knick Points of Southern Africa
AU: * Crossley, R
EM: rc@robresint.co.uk
AF: Fugro Robertson Ltd, Llanrhos, Llandudno, LL30 1SA United Kingdom
AU: Markwick, P
EM: paul@markwick001.freeserve.co.uk
AF: Fugro Robertson Ltd, Llanrhos, Llandudno, LL30 1SA United Kingdom
AB: Successful interpretation of the longitudinal profiles of rivers in southern Africa requires identification of the relative roles of bedrock geology, tectonics, river capture history, climatic change and eustasy. Knick points, expressed as waterfalls or as changes in gradient, are examined for the Kunene, Orange, Zambezi and Shire Rivers utilising Shuttle Imaging Radar topographic data, Gtopo 30 topographic data, Hydro 1K drainage data, satellite imagery, zoogeography and fieldwork. The results provide insights into what can, and cannot, be inferred about the uplift history of Africa.
DE: 8103 Continental cratons
DE: 8105 Continental margins: divergent (1212, 8124)
DE: 8110 Continental tectonics: general (0905)
DE: 8175 Tectonics and landscape evolution
DE: 8177 Tectonics and climatic interactions
SC: Tectonophysics [T]
MN: Fall Meeting 2005