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
... barrier tidal flats during transgressive reworking of a delta top . In the Western Cape , two localities in the Wagen Drift Formation have yielded a number of brachiopods , including Tropidoleptus , Australospirifer , chonetaceans and ...
... barrier tidal flats during transgressive reworking of a delta top . In the Western Cape , two localities in the Wagen Drift Formation have yielded a number of brachiopods , including Tropidoleptus , Australospirifer , chonetaceans and ...
Page 220
... barrier - beach shoreline ( Johnson 1976 ) . This change must reflect a reduction in the sediment supply to the shore zone and a decrease in the rate of subsidence so that marginal marine processes rework and redistribute the sediment ...
... barrier - beach shoreline ( Johnson 1976 ) . This change must reflect a reduction in the sediment supply to the shore zone and a decrease in the rate of subsidence so that marginal marine processes rework and redistribute the sediment ...
Page 221
... barrier islands migrate landward and that scouring associated with wash - over is responsible for the initiation of new tidal inlets . The clean quartz arenites that form the bulk of the Witpoort Formation show many of the ...
... barrier islands migrate landward and that scouring associated with wash - over is responsible for the initiation of new tidal inlets . The clean quartz arenites that form the bulk of the Witpoort Formation show many 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