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 18
... rounded , sand - filled tubes appear to intersect the bedding surface but their verti- cal extent has not yet been established . Interpretation These enigmatic trace fossils resemble Chondrites , their surface appearance corresponding ...
... rounded , sand - filled tubes appear to intersect the bedding surface but their verti- cal extent has not yet been established . Interpretation These enigmatic trace fossils resemble Chondrites , their surface appearance corresponding ...
Page 20
... rounded cross - sections of vertical sand - filled tubes on a sandstone bedding surface . These traces are similar to Chondrites . probably worms ( Nicholson 1873 ; Häntzschel 1975 : W95 - W97 ) . The indistinct walls suggest the host ...
... rounded cross - sections of vertical sand - filled tubes on a sandstone bedding surface . These traces are similar to Chondrites . probably worms ( Nicholson 1873 ; Häntzschel 1975 : W95 - W97 ) . The indistinct walls suggest the host ...
Page 21
... rounded ends ( arrowed ) , which resemble Planolites . Note that the burrow fill is almost indistinguishable from the substrate ; the burrow margins are revealed only by the effects of differential weathering . mind , however , that ...
... rounded ends ( arrowed ) , which resemble Planolites . Note that the burrow fill is almost indistinguishable from the substrate ; the burrow margins are revealed only by the effects of differential weathering . mind , however , that ...
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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