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
... anoxic conditions in parts of an ancient epeiric sea . Barren sandstone units in the Sardinia Bay strata represent former high - energy depositional environments and shifting substrates hostile to sediment - dwelling organisms . Pyritic ...
... anoxic conditions in parts of an ancient epeiric sea . Barren sandstone units in the Sardinia Bay strata represent former high - energy depositional environments and shifting substrates hostile to sediment - dwelling organisms . Pyritic ...
Page 11
... anoxic , hypersaline environment beyond tidal reach INNER SHELF MUD AND SAND small tidal megripple fields colonized by sediment - dwelling organisms . Muddy anoxic where tide - damped SHOREFACE DEPOSITS associated with line of wave ...
... anoxic , hypersaline environment beyond tidal reach INNER SHELF MUD AND SAND small tidal megripple fields colonized by sediment - dwelling organisms . Muddy anoxic where tide - damped SHOREFACE DEPOSITS associated with line of wave ...
Page 23
... anoxic hypersaline conditions prevailed . The inner- most shelf areas might therefore be characterized at best by a restricted biota , at worst by no biota at all . Mudrock units in the Sardinia Bay Formation containing disseminated ...
... anoxic hypersaline conditions prevailed . The inner- most shelf areas might therefore be characterized at best by a restricted biota , at worst by no biota at all . Mudrock units in the Sardinia Bay Formation containing disseminated ...
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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