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 ... WELTEVREDE FORMATION Fig . 2. Stratigraphic columns for the lower part of the Witteberg Group in the Eastern and Western ...
... Formation is the lowest unit of the Witteberg Group ( Fig . 2 ) . It consists essentially of siltstone and shale ... WELTEVREDE FORMATION Fig . 2. Stratigraphic columns for the lower part of the Witteberg Group in the Eastern and Western ...
Page 218
... Formation is the Blinkberg Formation , an extremely mature quartz arenite ... Weltevrede Subgroup is occupied by the Witpoort Formation , a thick sequence ... ( Fig . 2 ) . It is a thick succession of shales and siltstones with substantial ...
... Formation is the Blinkberg Formation , an extremely mature quartz arenite ... Weltevrede Subgroup is occupied by the Witpoort Formation , a thick sequence ... ( Fig . 2 ) . It is a thick succession of shales and siltstones with substantial ...
Page 220
... Weltevrede Formation were deposited during a destructional phase . This ... ( Fig . 5 ) . The sandstone units thin upwards and are overlain by vertical ... Weltevrede Formation to the Witpoort Formation is thought to mark a major change in ...
... Weltevrede Formation were deposited during a destructional phase . This ... ( Fig . 5 ) . The sandstone units thin upwards and are overlain by vertical ... Weltevrede Formation to the Witpoort Formation is thought to mark a major change 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