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
... Analysis of the sedimentary facies shows that the fossils come from a sequence of interbedded shales , siltstones and sandstones arranged in a number of thin upward - fining cycles and displaying flaser , lenticular and wavy bedding ...
... Analysis of the sedimentary facies shows that the fossils come from a sequence of interbedded shales , siltstones and sandstones arranged in a number of thin upward - fining cycles and displaying flaser , lenticular and wavy bedding ...
Page 217
... analysis that could provide corroborative evidence for the environmental assumptions . STRATIGRAPHY In the Western Cape , the Wagen Drift Formation is the lowest unit of the Witteberg Group ( Fig . 2 ) . It consists essentially of ...
... analysis that could provide corroborative evidence for the environmental assumptions . STRATIGRAPHY In the Western Cape , the Wagen Drift Formation is the lowest unit of the Witteberg Group ( Fig . 2 ) . It consists essentially of ...
Page 218
... Analysis of the sedimentary facies exposed in Howison's Poort , near Grahamstown ( Fig . 3 ) , shows that the upper part of the Weltevrede Formation displays two distinct facies associations . A lower upward - coarsening sequence ...
... Analysis of the sedimentary facies exposed in Howison's Poort , near Grahamstown ( Fig . 3 ) , shows that the upper part of the Weltevrede Formation displays two distinct facies associations . A lower upward - coarsening sequence ...
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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