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 Com- mittee 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 Com- mittee 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 deter- mine 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 deter- mine a Middle or Upper Devonian ( Givetian - Frasnian ) age . Witteberg ...
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Common terms and phrases
abbreviated AFRICA articulate brachiopods barrier islands benthic assemblages BENTHIC COMMUNITIES bicuspidata Gould bivalves bivalves and possible Blinkberg Formation Bokkeveld Group Boucot British Museum Natural carbonaceous shales Chonetes Chonetid Community comma cross-bedded deeper-water subtidal conditions delta deposited Devonian rocks environmental External mould facies analysis Falkland Islands fauna Formation near Touws 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 namacolus Orbiculoidea overlain paratypes parentheses pedicle valve punctuation salinity sandstones scientific name sediment SEDIMENTARY FACIES shoreline shouldered italics siltstone and shale Silurian and Devonian SOUTH AFRICAN MUSEUM specimens Spiriferid Community 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 Wagen Drift Formation wash-over Weltevrede Formation Western Cape Witpoort Formation yielded marine invertebrate