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
... diameter and penetrate little more than 12 cm into the substrate . In a few examples relict mammilation of the ... diameter . Fig . 3. Large - diameter vertical burrows . Differential 12 ANNALS OF THE SOUTH AFRICAN MUSEUM.
... diameter and penetrate little more than 12 cm into the substrate . In a few examples relict mammilation of the ... diameter . Fig . 3. Large - diameter vertical burrows . Differential 12 ANNALS OF THE SOUTH AFRICAN MUSEUM.
Page 13
... diameter vertical burrows . Differential weathering of the less resistant burrow- fill and lining results in a bedding surface crowded with holes perpendicular to bedding . 5 cm . Scale = Interpretation These vertical burrows are ...
... diameter vertical burrows . Differential weathering of the less resistant burrow- fill and lining results in a bedding surface crowded with holes perpendicular to bedding . 5 cm . Scale = Interpretation These vertical burrows are ...
Page 18
... diameter and 10 cm long , branch repeatedly , and cross one another . Raised stellate forms with burrows radiating from a central hub can also be recognized . Small , rounded , sand - filled tubes appear to intersect the bedding surface ...
... diameter and 10 cm long , branch repeatedly , and cross one another . Raised stellate forms with burrows radiating from a central hub can also be recognized . Small , rounded , sand - filled tubes appear to intersect the bedding surface ...
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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