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 12
... individual traces can seldom be named with confidence and some of the trace fossils could represent hitherto undescribed forms . In certain instances , trace fossils in the Sardinia Bay Formation exceed the time ranges known for ...
... individual traces can seldom be named with confidence and some of the trace fossils could represent hitherto undescribed forms . In certain instances , trace fossils in the Sardinia Bay Formation exceed the time ranges known for ...
Page 14
... individual shaft sections are up to 50 cm long . Inclined shafts may run parallel to foreset surfaces in the cross - bedded sandstone . Interpretation The sub - horizontal branching burrow systems described above are closely similar to ...
... individual shaft sections are up to 50 cm long . Inclined shafts may run parallel to foreset surfaces in the cross - bedded sandstone . Interpretation The sub - horizontal branching burrow systems described above are closely similar to ...
Page 15
... internal lamination of the host bed is virtually destroyed ( Fig . 8 ) . Individual tubes appear to penetrate whole beds of up to 60 cm in thickness . U - tube spreiten 5am Sury scale Fig . 7 TRACE FOSSILS OF THE SARDINIA BAY FORMATION 15.
... internal lamination of the host bed is virtually destroyed ( Fig . 8 ) . Individual tubes appear to penetrate whole beds of up to 60 cm in thickness . U - tube spreiten 5am Sury scale Fig . 7 TRACE FOSSILS OF THE SARDINIA BAY FORMATION 15.
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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