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 217
... sandstones . Hiller & Dunlevey ( 1978 ) , working in the Touws River - Montagu area , subdivided that part of the stratigraphy straddling the Bokkeveld Group - Witteberg Group boundary into three formations , of which the upper two were ...
... sandstones . Hiller & Dunlevey ( 1978 ) , working in the Touws River - Montagu area , subdivided that part of the stratigraphy straddling the Bokkeveld Group - Witteberg Group boundary into three formations , of which the upper two were ...
Page 218
... sandstones ( Fig . 4 ) . Load structures are a feature of several sandstone - shale contacts . This sequence is interpreted as the product of a prograding distributary mouth bar in a delta complex ( Wright 1978 ) . It is overlain by a ...
... sandstones ( Fig . 4 ) . Load structures are a feature of several sandstone - shale contacts . This sequence is interpreted as the product of a prograding distributary mouth bar in a delta complex ( Wright 1978 ) . It is overlain by a ...
Page 220
... sandstones . In the basal 10-12 m these are brownish in colour , fine to medium grained , and display horizontal lamination and ripple cross - lamination . Above this level the sandstones are cleaner , slightly coarser grained , greyish ...
... sandstones . In the basal 10-12 m these are brownish in colour , fine to medium grained , and display horizontal lamination and ripple cross - lamination . Above this level the sandstones are cleaner , slightly coarser grained , greyish ...
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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