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 220
... islands that migrated landwards over the tidal - flat facies . The Witpoort Formation consists mostly of mature sandstones . In the basal 10-12 m these are brownish in colour , fine to medium grained , and display horizontal lamination ...
... islands that migrated landwards over the tidal - flat facies . The Witpoort Formation consists mostly of mature sandstones . In the basal 10-12 m these are brownish in colour , fine to medium grained , and display horizontal lamination ...
Page 221
... islands migrate landward and that scouring associated with wash - over is responsible for the initiation of new ... island sandstones , Witpoort Formation , Howison's Poort . SEDIMENTARY FACIES IN THE LOWER WITTEBERG GROUP 221.
... islands migrate landward and that scouring associated with wash - over is responsible for the initiation of new ... island sandstones , Witpoort Formation , Howison's Poort . SEDIMENTARY FACIES IN THE LOWER WITTEBERG GROUP 221.
Page 222
... Islands and South American correlatives . The bivalves are too poorly preserved for even generic identification . The assemblage is dominated by brachiopods but their distribution varies within the formation . The articulate brachiopods ...
... Islands and South American correlatives . The bivalves are too poorly preserved for even generic identification . The assemblage is dominated by brachiopods but their distribution varies within the formation . The articulate brachiopods ...
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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