Colluvial deposits and slope instability

Greg A. Botha, Arnaud J.A.M. Temme, Rebekah G. Singh

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

1 Citation (Scopus)


Slope instability results from the interplay between tectonic uplift, climatecontrolled weathering, and slope form (relief). Sediments accumulate as colluvium on footslopes when under the influence of gravity, fluvial processes and mass movements, and may be affected by pedogenesis, ecosystem change and human activity. This chapter shows that colluvial form and stratigraphy cannot be uncritically assigned to particular late Pleistocene and Holocene climatic periods, because of the feedbacks associated with weathering rate, vegetation responses to climate, and slope angle. Moreover, land surface instability and colluvial formation/incision is taking place due to contemporary environmental degradation, closely related to overgrazing.

Original languageEnglish
Title of host publicationQuaternary Environmental Change in Southern Africa
Subtitle of host publicationPhysical and Human Dimensions
EditorsG.A. Botha, J.A.M. Temme, R.G. Singh
PublisherCambridge University Press
Number of pages16
ISBN (Electronic)9781107295483
ISBN (Print)9781107055797
Publication statusPublished - Jun 2016

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