Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumWest, Newman & Company for the trustees of the Museum, 1991 - Natural history |
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Page 11
... Bioturbated units , indicated by the generic names of the more important trace fossils ( Fig . 2 ) , are limited to planar cross - bedded sandstones attributed to the migration of small megaripples in an inner - shelf depositional ...
... Bioturbated units , indicated by the generic names of the more important trace fossils ( Fig . 2 ) , are limited to planar cross - bedded sandstones attributed to the migration of small megaripples in an inner - shelf depositional ...
Page 16
... bioturbated sandstone . Interpretation These are probably Skolithos tubes ( Upper Precambrian - Lower Creta- ceous ) , usually attributed to the activities of marine worms but of uncertain origin ( Häntzschel 1975 : W108 ) . Skolithos ...
... bioturbated sandstone . Interpretation These are probably Skolithos tubes ( Upper Precambrian - Lower Creta- ceous ) , usually attributed to the activities of marine worms but of uncertain origin ( Häntzschel 1975 : W108 ) . Skolithos ...
Page 23
... bioturbated sandstones ( see Fig . 2 ) . Such rapid vertical facies changes are probably typical of epeiric sea ... bioturbation . The ichnofaunal diversity was not so restricted , however , which suggests that the sediments hosted a ...
... bioturbated sandstones ( see Fig . 2 ) . Such rapid vertical facies changes are probably typical of epeiric sea ... bioturbation . The ichnofaunal diversity was not so restricted , however , which suggests that the sediments hosted a ...
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Common terms and phrases
abbreviated bioturbated burrow fill callianassid decapods Cape Town Chondrites cm Fig cm in diameter colonization by sediment-dwellers correlation cross-section Cruziana ichnofacies model currents and waves decapods depositional environment Description Differential weathering Diplocraterion disseminated pyrite EARLY ORDOVICIAN SARDINIA Ekdale epeiric sea FACIES INTERPRETATIONS Fascifodina Figure Frey & Pemberton Gastropoda Häntzschel 1975 holotype ichno ichnogenus indicate INNER SHELF MEGARIPPLE INNER SHELF MUD INNERMOST SHELF MUD interval Irregular U-tubes Leda MUD AND SAND Mudrock units namacolus occur Ophiomorpha paper paratypes parentheses Pemberton 1984 Port Elizabeth punctuation quartzite references relict sedimentary structures Restricted biota rocks Roman numerals sandstone sole Sardinia Bay Formation scientific name sediment sediment-dwelling organisms sedimentary structures Seilacher 1967 shafts shallow marine Shone shoreface Skolithos ichnofacies Skolithos tubes sole marking SOUTH AFRICAN MUSEUM Spreiten demarcated sub-horizontal Synonymy Table Mountain Group Thalassinoides tidal currents trace fossil assemblages trace fossil association traces resembling Upper Sardinia Bay V-shaped pattern Vermiform sand-filled tubes vertical burrows