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
... thick cross - bedded quartz arenites of the Witpoort Formation . The top part of the Weltevrede Formation is interpreted as having formed in back - barrier tidal flats during transgressive reworking of a delta top . In the Western Cape ...
... thick cross - bedded quartz arenites of the Witpoort Formation . The top part of the Weltevrede Formation is interpreted as having formed in back - barrier tidal flats during transgressive reworking of a delta top . In the Western Cape ...
Page 218
... thick heterolithic unit comprising siltstone and shale with thin sandstone interbeds , and containing plant fossils and Zoophycos traces . The top of the Weltevrede Subgroup is occupied by the Witpoort Formation , a thick sequence of ...
... thick heterolithic unit comprising siltstone and shale with thin sandstone interbeds , and containing plant fossils and Zoophycos traces . The top of the Weltevrede Subgroup is occupied by the Witpoort Formation , a thick sequence of ...
Page 222
... thick ) dark grey to black carbonaceous shales with silty layers , siderite nodules and numerous plant fragments . These probably formed in stagnant back - barrier lagoonal or marsh environments ( Fig . 6 ) . A similar detailed facies ...
... thick ) dark grey to black carbonaceous shales with silty layers , siderite nodules and numerous plant fragments . These probably formed in stagnant back - barrier lagoonal or marsh environments ( Fig . 6 ) . A similar detailed facies ...
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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