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 215
... cycles and displaying flaser , lenticular and wavy bedding . This sequence rests on lithic arenites at the top of an upward - coarsening unit and is overlain by thick cross - bedded quartz arenites of the Witpoort Formation . The top ...
... cycles and displaying flaser , lenticular and wavy bedding . This sequence rests on lithic arenites at the top of an upward - coarsening unit and is overlain by thick cross - bedded quartz arenites of the Witpoort Formation . The top ...
Page 220
... cycle . The upward - fining cycles are interpreted as being the products of a tidal - flat environment crossed by meandering tidal channels ( Tankard & Barwis 1982 ) . The change - over from the Weltevrede Formation to the Witpoort ...
... cycle . The upward - fining cycles are interpreted as being the products of a tidal - flat environment crossed by meandering tidal channels ( Tankard & Barwis 1982 ) . The change - over from the Weltevrede Formation to the Witpoort ...
Page 222
... cycle that follows directly on from similar cycles in the Bokkeveld Group . Tankard et al . ( 1982 ) indicated that the Wagen Drift Formation represents the subaqueous portion of a delta and that the overlying quartz arenites of the ...
... cycle that follows directly on from similar cycles in the Bokkeveld Group . Tankard et al . ( 1982 ) indicated that the Wagen Drift Formation represents the subaqueous portion of a delta and that the overlying quartz arenites of the ...
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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