Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum |
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Page 220
The major erosion surface marks the end of the constructional phase of delta out - building and the remaining sediments of the Weltevrede Formation were deposited during a destructional phase . This involved transgressive marine ...
The major erosion surface marks the end of the constructional phase of delta out - building and the remaining sediments of the Weltevrede Formation were deposited during a destructional phase . This involved transgressive marine ...
Page 221
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 islands migrate landward and that scouring associated with ...
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 islands migrate landward and that scouring associated with ...
Page 228
The shales at the top of the Weltevrede Formation at Howison's Poort are thought to have been deposited in intertidal flats established during transgressive reworking of an abandoned delta lobe . The Wagen Drift Formation is taken to ...
The shales at the top of the Weltevrede Formation at Howison's Poort are thought to have been deposited in intertidal flats established during transgressive reworking of an abandoned delta lobe . The Wagen Drift Formation is taken to ...
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Common terms and phrases
abbreviated according articulate brachiopods association author's name authors basal bedding benthic assemblages bivalves Blinkberg Bokkeveld Group Boucot capital collected communities consists containing cycles delta deposited described Devonian Devonian rocks differences displaying DISTRIBUTARY diversity dominated Eastern environment environmental fauna figures gastropod homalonotid Howison's Poort illustrations inarticulate indicate infaunal interpreted intertidal italics known letters Lingula localities lower major marine marine invertebrates mark Member Middle mould Museum Natural History nearshore Note occur original periods placed plant fossils Plectonotus possible quartz arenites range recognized recorded references represent reworking salinity sandstones scientific sediment SEDIMENTARY FACIES separates sequence shales shallow siltstone similar Smith South African species specimens Stratigraphic subtidal suggest Tables Tankard thick thin Touws River trace fossils trilobite unit upper upward-fining valve Wagen Drift Formation Weltevrede Formation Western Cape Witpoort Formation Witteberg Group yielded Zoophycos