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
... displaying flaser , lenticular and wavy bedding . This sequence rests on lithic arenites at the top of an upward - coarsening unit and is overlain by thick cross - bedded quartz arenites of the Witpoort Formation . The top part of the ...
... displaying flaser , lenticular and wavy bedding . This sequence rests on lithic arenites at the top of an upward - coarsening unit and is overlain by thick cross - bedded quartz arenites of the Witpoort Formation . The top part of the ...
Page 218
... displaying lenticular bedding , passing upward into horizontally laminated and ripple cross - laminated sandstones ( Fig . 4 ) . Load structures are a feature of several sandstone - shale contacts . This sequence is interpreted as the ...
... displaying lenticular bedding , passing upward into horizontally laminated and ripple cross - laminated sandstones ( Fig . 4 ) . Load structures are a feature of several sandstone - shale contacts . This sequence is interpreted as the ...
Page 220
... displaying planar and trough cross - bedding and horizontal lamination . The lowest sand- stones were probably deposited by wash - over processes into. Fig . 4. Top of an upward - coursening sequence in the Weltevrede Formation ...
... displaying planar and trough cross - bedding and horizontal lamination . The lowest sand- stones were probably deposited by wash - over processes into. Fig . 4. Top of an upward - coursening sequence in the Weltevrede Formation ...
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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