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
... formations , of which the upper two were placed in the Witteberg Group . The South African Committee for Stratigraphy ( SACS ) ( 1980 ) regarded these two units as being informal members within their Wagen Drift Formation . The lower ...
... formations , of which the upper two were placed in the Witteberg Group . The South African Committee for Stratigraphy ( SACS ) ( 1980 ) regarded these two units as being informal members within their Wagen Drift Formation . The lower ...
Page 218
... Wagen Drift Formation is the Blinkberg Formation , an extremely mature quartz arenite unit , which contains some plant fossils . This in turn , is overlain by the Swartruggens Formation , a relatively thick heterolithic unit comprising ...
... Wagen Drift Formation is the Blinkberg Formation , an extremely mature quartz arenite unit , which contains some plant fossils . This in turn , is overlain by the Swartruggens Formation , a relatively thick heterolithic unit comprising ...
Page 228
... Wagen Drift Formation and a Frasnian age for the top part of the Weltevrede Formation . This slight age difference is unimportant in explaining the differences in the fauna between the localities described here . As has been pointed out ...
... Wagen Drift Formation and a Frasnian age for the top part of the Weltevrede Formation . This slight age difference is unimportant in explaining the differences in the fauna between the localities described here . As has been pointed out ...
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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