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
... descriptions that follow are set out in accordance with the problems outlined above . ? OPHIOMORPHA Description Large sub - cylindrical sand - filled vertical burrows with dark pyritic linings occur as endichnial traces in several ...
... descriptions that follow are set out in accordance with the problems outlined above . ? OPHIOMORPHA Description Large sub - cylindrical sand - filled vertical burrows with dark pyritic linings occur as endichnial traces in several ...
Page 14
... Description Smooth - walled sand - filled sub - horizontal to inclined burrows , with a lining of dark pyritic sand and circular to flattened - oval in cross - section ( Fig . 4 ) , occur in close stratigraphic proximity to beds ...
... Description Smooth - walled sand - filled sub - horizontal to inclined burrows , with a lining of dark pyritic sand and circular to flattened - oval in cross - section ( Fig . 4 ) , occur in close stratigraphic proximity to beds ...
Page 18
... Description Figure 10 represents a sandstone sole marking that consists of a series of raised elongate ridges in a V - shaped pattern . It is clear that the ridges on the sandstone sole are casts of a series of V - shaped grooves cut in ...
... Description Figure 10 represents a sandstone sole marking that consists of a series of raised elongate ridges in a V - shaped pattern . It is clear that the ridges on the sandstone sole are casts of a series of V - shaped grooves cut in ...
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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