Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum |
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Page 217
It consists essentially of siltstone and shale with interbedded sandstones . Hiller
& Dunlevey ( 1978 ) , working in the Touws River - Montagu area , subdivided
that part of the stratigraphy straddling the Bokkeveld Group - Witteberg Group ...
It consists essentially of siltstone and shale with interbedded sandstones . Hiller
& Dunlevey ( 1978 ) , working in the Touws River - Montagu area , subdivided
that part of the stratigraphy straddling the Bokkeveld Group - Witteberg Group ...
Page 218
This in turn , is overlain by the Swartruggens Formation , a relatively thick
heterolithic unit comprising siltstone and shale with thin sandstone interbeds ,
and containing plant fossils and Zoophycos traces . The top of the Weltevrede
Subgroup is ...
This in turn , is overlain by the Swartruggens Formation , a relatively thick
heterolithic unit comprising siltstone and shale with thin sandstone interbeds ,
and containing plant fossils and Zoophycos traces . The top of the Weltevrede
Subgroup is ...
Page 220
The sandstone units thin upwards and are overlain by vertical alternations of
siltstone and shale in which flaser and ... Above this level the sandstones are
cleaner , slightly coarser grained , greyish quartz arenites displaying planar and
trough ...
The sandstone units thin upwards and are overlain by vertical alternations of
siltstone and shale in which flaser and ... Above this level the sandstones are
cleaner , slightly coarser grained , greyish quartz arenites displaying planar and
trough ...
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Common terms and phrases
abbreviated according AFRICA articulate brachiopods association author's name authors basal bedding benthic assemblages BENTHIC COMMUNITIES bivalves Blinkberg Bokkeveld Group Boucot capital collected communities consists containing cycles delta deposited described Devonian Devonian rocks differences DISTRIBUTARY diversity dominated Eastern environment environmental fauna figures gastropod homalonotid Howison's Poort illustrations inarticulate indicate infaunal interpreted intertidal Islands italics known letters Lingula localities lower major marine marine invertebrates mark Member Middle mould Museum Natural History nearshore Note occur original parentheses placed plant fossils Plectonotus punctuation quartz arenites range 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 valve Wagen Drift Formation Weltevrede Formation Western Cape Witpoort Formation Witteberg Group yielded Zoophycos