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
... overlain by 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 ...
... overlain by 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 ...
Page 218
... overlain by the Swartruggens Formation , a relatively 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 ...
... overlain by the Swartruggens Formation , a relatively 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 ...
Page 220
... overlain by vertical alternations of siltstone and shale in which flaser and lenticular bedding are common . Trace fossils are common throughout the sequence and marine invertebrates were recovered from the topmost cycle . The upward ...
... overlain by vertical alternations of siltstone and shale in which flaser and lenticular bedding are common . Trace fossils are common throughout the sequence and marine invertebrates were recovered from the topmost cycle . The upward ...
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Common terms and phrases
abbreviated AFRICA articulate brachiopods barrier islands basal Witteberg beds benthic assemblages BENTHIC COMMUNITIES Blinkberg Formation Bokkeveld Group Boucot British Museum Natural carbonaceous shales Chonetes comma cross-bedded delta deposited Devonian rocks environmental External mould facies analysis Falkland Islands fauna 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 Orbiculoidea overlain paratypes parentheses pedicle valve Plectonotus sp punctuation quartz arenite unit registration number ripple cross-laminated sandstone Roman numerals salinity sandstones scientific name sediment SEDIMENTARY FACIES shoreline siltstone and shale Silurian and Devonian SOUTH AFRICAN MUSEUM specimens Spiriferid 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 vicinity of Touws volume number Wagen Drift Formation wash-over WELTEVREDE FORMATION Fig Western Cape yielded marine invertebrate