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 9
... energy depositional environments and shifting substrates hostile to sediment - dwelling organisms . Pyritic trace - free mudrocks may have been deposited in biologi- cally sterile parts of the epeiric sea . CONTENTS PAGE Introduction ...
... energy depositional environments and shifting substrates hostile to sediment - dwelling organisms . Pyritic trace - free mudrocks may have been deposited in biologi- cally sterile parts of the epeiric sea . CONTENTS PAGE Introduction ...
Page 21
... energy regimes in shallow marine settings , ranging from shallow shelf and shoreface to estuarine and tidal - flat environments . CRUZIANA ICHNOFACIES The Cruziana ichnofacies model ( Seilacher 1967 ;. TRACE FOSSILS OF THE SARDINIA BAY ...
... energy regimes in shallow marine settings , ranging from shallow shelf and shoreface to estuarine and tidal - flat environments . CRUZIANA ICHNOFACIES The Cruziana ichnofacies model ( Seilacher 1967 ;. TRACE FOSSILS OF THE SARDINIA BAY ...
Page 24
... energy environment in which ichnocoenoses were seldom displaced . Bed- ding traces formed here would have a very low preservation potential because of the high degree of bioturbation . This places Skolithos out of the high - energy ...
... energy environment in which ichnocoenoses were seldom displaced . Bed- ding traces formed here would have a very low preservation potential because of the high degree of bioturbation . This places Skolithos out of the high - energy ...
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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