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
... deposited during a destructional phase . This involved transgressive marine reworking of the delta top ( Fisher et al . 1969 ) . The upper 70 m of the Weltevrede Formation comprise quartz arenites , siltstones and shales arranged in a ...
... deposited during a destructional phase . This involved transgressive marine reworking of the delta top ( Fisher et al . 1969 ) . The upper 70 m of the Weltevrede Formation comprise quartz arenites , siltstones and shales arranged in a ...
Page 221
Annale Van Die Suid-Afrikaanse Museum South African Museum. stones were probably deposited by wash - over processes into the tidal - flat area . Reinson ( 1984 ) has noted that wash - over is one of the main processes by which barrier ...
Annale Van Die Suid-Afrikaanse Museum South African Museum. stones were probably deposited by wash - over processes into the tidal - flat area . Reinson ( 1984 ) has noted that wash - over is one of the main processes by which barrier ...
Page 228
... deposited in intertidal flats established during transgressive reworking of an abandoned delta lobe . The Wagen Drift Formation is taken to represent a prograding delta and its shales were deposited in a delta slope environment ...
... deposited in intertidal flats established during transgressive reworking of an abandoned delta lobe . The Wagen Drift Formation is taken to represent a prograding delta and its shales were deposited in a delta slope environment ...
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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