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
... Formation is the lowest unit of the Witteberg Group ( Fig . 2 ) . It consists essentially of siltstone and shale ... WITPOORT FORMATION SWARTRUGGENS FORMATION BLINKBERG FM marine fossils WAGEN DRIFT FM WITPOORT FORMATION marine fossils ...
... Formation is the lowest unit of the Witteberg Group ( Fig . 2 ) . It consists essentially of siltstone and shale ... WITPOORT FORMATION SWARTRUGGENS FORMATION BLINKBERG FM marine fossils WAGEN DRIFT FM WITPOORT FORMATION marine fossils ...
Page 218
... Witpoort Formation , a thick sequence of white - weathering quartz arenites with thin shale partings and containing plant fossils . In the Eastern Cape the lateral equivalent of the Wagen Drift , Blinkberg and Swartruggens formations is ...
... Witpoort Formation , a thick sequence of white - weathering quartz arenites with thin shale partings and containing plant fossils . In the Eastern Cape the lateral equivalent of the Wagen Drift , Blinkberg and Swartruggens formations is ...
Page 220
... Formation to the Witpoort Formation is thought to mark a major change in shoreline configuration from a lobate or arcuate deltaic shoreline to a linear barrier - beach shoreline ( Johnson 1976 ) . This change must reflect a reduction in ...
... Formation to the Witpoort Formation is thought to mark a major change in shoreline configuration from a lobate or arcuate deltaic shoreline to a linear barrier - beach shoreline ( Johnson 1976 ) . This change must reflect a reduction in ...
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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