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 218
... shale partings and containing plant fossils . In the Eastern Cape the lateral equivalent of the Wagen Drift , Blinkberg and Swartruggens formations is the Weltevrede Formation ( Fig . 2 ) . It is a thick succession of shales and ...
... shale partings and containing plant fossils . In the Eastern Cape the lateral equivalent of the Wagen Drift , Blinkberg and Swartruggens formations is the Weltevrede Formation ( Fig . 2 ) . It is a thick succession of shales and ...
Page 220
... shales arranged in a number of upward - fining cycles ( Fig . 5 ) . The sandstone units thin upwards and are overlain by vertical alternations of siltstone and shale in which flaser and lenticular bedding are common . Trace fossils are ...
... shales arranged in a number of upward - fining cycles ( Fig . 5 ) . The sandstone units thin upwards and are overlain by vertical alternations of siltstone and shale in which flaser and lenticular bedding are common . Trace fossils are ...
Page 228
... 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 ...
... 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 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