Letter | Published:

The sedimentary environment of the Deweras Group in Rhodesia

Naturevolume 272pages810812 (1978) | Download Citation



THE sediments of the Deweras Group comprise a thick succession of alluvial deposits laid down in a fault-bound trough and bear a close lithologie and tectonic similarity to the broadly contemporaneous sediments of the Water-berg, Soutpansberg and Matsap successions further to the south. It is significant, therefore, that the troughs in which all these sediments were deposited show a marked alignment and it is suggested here that they may be interpreted as a palaeo-rift system between 2,100 and 1,300 Myr old. The Deweras Group (Figs 1 and 2) comprises a thick succession of clastic and argillaceous rocks, together with interbedded andesitic lavas. At the base of the sequence is a widespread but impersistent unit of continental tholeiitic basalts. These sediments crop out as a north-north-east (NNE) trending belt in central–north Rhodesia in a basin herein referred to as the Deweras trough.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Potter, P. E. Bull. Am. Ass. Petrol. Geol. 51, 337–365 (1957).

  2. 2

    Jacobsen, J. B. E. thesis, Univ. Witwatersrand (1962).

  3. 3

    Jacobsen, W. B. G. Geol. Rundsch. 58, 908–929 (1969).

  4. 4

    Jansen, H. Trans. Geol. Soc. S. Afr. 78, 25–34 (1974).

  5. 5

    Jansen, H. Trans. Geol. Soc. S. Afr. 78, 129–136 (1975).

  6. 6

    Jansen, H. Trans. Geol. Soc. S. Afr. 79, 281–291 (1976a).

  7. 7

    Barker, O. B. Trans. geol. Soc. S. Afr. 79, 146 (1976).

  8. 8

    Jansen, H. Trans. geol. Soc. S. Afr. 79, 146–147 (1976b).

  9. 9

    Crockett, R. N. thesis, Univ. London (1969).

  10. 10

    Crockett, R. N. Trans. geol. Soc. S. Afr. 74, 211–235 (1971).

  11. 11

    Crockett, R. N. & Jones, M. T. Trans. geol. Soc. S. Afr. 78, 1–10 (1975).

  12. 12

    Bliss, N. W. Trans. geol. Soc. S. Afr. 74, 133–147 (1971).

Download references

Author information


  1. Department of Geology and Mineralogy, Parks Road, Oxford, UK

    • M. R. COOPER


  1. Search for M. R. COOPER in:

About this article

Publication history



Issue Date




By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.