Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumWest, Newman & Company for the trustees of the Museum, 1990 - Natural history |
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Page 217
... upper two were placed in the Witteberg Group . The South African Committee for Stratigraphy ( SACS ) ( 1980 ) regarded these two units as being informal members within their Wagen Drift Formation . The lower , Nougaspoort Member ...
... upper two were placed in the Witteberg Group . The South African Committee for Stratigraphy ( SACS ) ( 1980 ) regarded these two units as being informal members within their Wagen Drift Formation . The lower , Nougaspoort Member ...
Page 218
... upper part of the Weltevrede Formation displays two distinct facies associations . A lower upward - coarsening sequence consists of interbedded micaceous shales and siltstones displaying lenticular bedding , passing upward into ...
... upper part of the Weltevrede Formation displays two distinct facies associations . A lower upward - coarsening sequence consists of interbedded micaceous shales and siltstones displaying lenticular bedding , passing upward into ...
Page 228
... upper part of the group led Gardiner ( 1969 ) to propose a Lower Carboniferous age , whereas Stapleton ( 1977a , 1977b ) used spores from the same horizon to determine a Middle or Upper Devonian ( Givetian - Frasnian ) age . Witteberg ...
... upper part of the group led Gardiner ( 1969 ) to propose a Lower Carboniferous age , whereas Stapleton ( 1977a , 1977b ) used spores from the same horizon to determine a Middle or Upper Devonian ( Givetian - Frasnian ) age . Witteberg ...
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Common terms and phrases
abbreviated AFRICA articulate brachiopods barrier islands basal Witteberg beds benthic assemblages BENTHIC COMMUNITIES Blinkberg Formation Bokkeveld Group Boucot British Museum Natural carbonaceous shales Chonetes comma cross-bedded delta deposited Devonian rocks environmental External mould facies analysis Falkland Islands fauna Frasnian gastropod genus Givetian Grahamstown high-diversity holotype homalonotid trilobite horizontal lamination Howison's Poort inarticulate infaunal interpreted Leda Lingula lepta LOWER WITTEBERG GROUP Museum Natural History Orbiculoidea overlain paratypes parentheses pedicle valve Plectonotus sp punctuation quartz arenite unit registration number ripple cross-laminated sandstone Roman numerals salinity sandstones scientific name sediment SEDIMENTARY FACIES shoreline siltstone and shale Silurian and Devonian SOUTH AFRICAN MUSEUM specimens Spiriferid Stratigraphic subheadings are shouldered suspension feeders SWARTRUGGENS FORMATION Synonymy Tankard & Barwis taxa Theron thin tidal tidal-flat Touws River trace fossils Trigonoglossa Tropidoleptus sp Upper Devonian upward-fining cycles vicinity of Touws volume number Wagen Drift Formation wash-over WELTEVREDE FORMATION Fig Western Cape yielded marine invertebrate