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 14
... of fill and lining . Basal surface of a sandstone . Note the branching burrow ( arrowed ) which resembles Thalassinoides . DIPLOCRATERION Description Spreiten demarcated by pyrite - rich laminae ,. 14 ANNALS OF THE SOUTH AFRICAN MUSEUM.
... of fill and lining . Basal surface of a sandstone . Note the branching burrow ( arrowed ) which resembles Thalassinoides . DIPLOCRATERION Description Spreiten demarcated by pyrite - rich laminae ,. 14 ANNALS OF THE SOUTH AFRICAN MUSEUM.
Page 15
... spreiten 10 cm Fig . 6. Spreiten demarcating the former positions of U - tubes indicating upward migration of U - shaped burrows , probably Diplocraterion . Tracing from a loose boulder . Interpretation Figure 6 shows a typical example ...
... spreiten 10 cm Fig . 6. Spreiten demarcating the former positions of U - tubes indicating upward migration of U - shaped burrows , probably Diplocraterion . Tracing from a loose boulder . Interpretation Figure 6 shows a typical example ...
Page 16
Annale Van Die Suid-Afrikaanse Museum South African Museum. U - tube spreiten 5am Sury scale Fig . 7 . Photograph ( top ) and tracing ( bottom ) showing an irregular U - tube with spreiten in a bioturbated sandstone . Interpretation ...
Annale Van Die Suid-Afrikaanse Museum South African Museum. U - tube spreiten 5am Sury scale Fig . 7 . Photograph ( top ) and tracing ( bottom ) showing an irregular U - tube with spreiten in a bioturbated sandstone . Interpretation ...
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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