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 9
... Diplocraterion , Skolithos , and Fascifodina . Hypichnial traces on the sole of one sandstone are tentatively identified as Cru- ziana . A number of enigmatic traces occur on bedding surfaces . Three trace fossil associations are ...
... Diplocraterion , Skolithos , and Fascifodina . Hypichnial traces on the sole of one sandstone are tentatively identified as Cru- ziana . A number of enigmatic traces occur on bedding surfaces . Three trace fossil associations are ...
Page 15
... Diplocraterion . Tracing from a loose boulder . Interpretation Figure 6 shows a typical example of Diplocraterion in which upward migration of the U - shaped burrow has occurred in response to sedimentation . The U - tubes themselves ...
... Diplocraterion . Tracing from a loose boulder . Interpretation Figure 6 shows a typical example of Diplocraterion in which upward migration of the U - shaped burrow has occurred in response to sedimentation . The U - tubes themselves ...
Page 21
... Diplocraterion . The wall linings indicate burrowing in soft sediment . Sedimentary structures associated with this ichno- facies include near - horizontal lamination , ripple laminae , trough cross - bedding , and flaser- , wavy- and ...
... Diplocraterion . The wall linings indicate burrowing in soft sediment . Sedimentary structures associated with this ichno- facies include near - horizontal lamination , ripple laminae , trough cross - bedding , and flaser- , wavy- and ...
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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