Distal alluvial fan sediments in early Proterozoic red beds of the Wilgerivier formation, Waterberg Group, South Africa

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Abstract

The 1900 – 1700 M.a. Waterberg Group belongs to a series of southern African cratonic cover sequences of roughly equivalent age. Red beds of the Wilgerivier Formation comprise sandstones, interbedded with subordinate conglomerates and minor mudrocks. These immature sedimentary rocks exhibit lenticular bedding, radial palaeocurrent patterns and features indicative of both streamflow and gravity-flow deposition. A distal wet alluvial fan palaeoenvironmental setting is envisaged, with fan-deltas forming where alluvial lobes prograded into a lacustrine basin. Intrastratal, diagenetic alteration of ferromagnesian detrital grains and ferruginous grain coatings led to the red colouration of the Wilgerivier sediments.

References (42)

  • W.B. Bull

    Recognition of alluvial-fan deposits in the stratigraphic record

  • A.L. Burger et al.

    Summary of age determinations carried out during the period April, 1978 to March, 1979

    Ann. Geol. Surv. S. Afr.

    (1980)
  • C.C. Callaghan

    The geology of the Waterberg Group in the southern portion of the Waterberg Basin

  • Cheney, E.S., Barton, J.M., and Brandl, G. In press. Age and extent of the Soutpansberg sequences of Southern Africa....
  • R.U. Cooke et al.

    Geomorphology in deserts

    (1973)
  • G.H. Davis et al.

    Ground-water conditions and storage capacity in the San Joaquin Valley, California

  • R.L. Folk

    Reddening of desert sands: Simpson Desert, N.T., Australia

    J. Sedim. Petrol.

    (1976)
  • W.E. Galloway et al.

    Terrigenous clastic depositional systems

    (1983)
  • K.W. Glennie

    Desert sedimentary environments

    (1970)
  • K.W. Glennie et al.

    Depositional environment and diagenesis of Permian Rotliegendes sandstonessin Leman Bankand Sole Pit areas of the UK southern North Sea

    J. Geol. Soc. London

    (1978)
  • C.V. Gole et al.

    Inland delta building activity of the Kosi River

  • Cited by (0)

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