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 20
... ICHNOFACIES MODELS AND DEPOSITIONAL ENVIRONMENT THE ICHNOFACIES CONCEPT Trace fossil assemblages are often associated with particular depositional environments ... Ichnofacies models and depositional environments The ichnofacies concept.
... ICHNOFACIES MODELS AND DEPOSITIONAL ENVIRONMENT THE ICHNOFACIES CONCEPT Trace fossil assemblages are often associated with particular depositional environments ... Ichnofacies models and depositional environments The ichnofacies concept.
Page 21
... ichnofacies models are likely to be less reliable in dealing with ancient sedimentary rocks than is the case in ... ICHNOFACIES The Skolithos ichnofacies model described by Seilacher ( 1967 ) and Frey & Pemberton ( 1984 : 198-199 ) is ...
... ichnofacies models are likely to be less reliable in dealing with ancient sedimentary rocks than is the case in ... ICHNOFACIES The Skolithos ichnofacies model described by Seilacher ( 1967 ) and Frey & Pemberton ( 1984 : 198-199 ) is ...
Page 23
... ichnofacies model but lacks Cruziana itself and is characterized by Skolithos ! Both Skolithos and Cruziana ichnofacies models indicate a shallow marine origin for the Sardinia Bay strata but details of the ichnofacies models are poorly ...
... ichnofacies model but lacks Cruziana itself and is characterized by Skolithos ! Both Skolithos and Cruziana ichnofacies models indicate a shallow marine origin for the Sardinia Bay strata but details of the ichnofacies models are poorly ...
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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