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 10
... Rocks of the Sardinia Bay Formation appear to have been subjected to low - grade load metamorphism prior to the folding episodes ( De Swardt & Rowsell 1974 ; Shone 1983 : 125 ) . Characteristic rock types are metaquartzites and ...
... Rocks of the Sardinia Bay Formation appear to have been subjected to low - grade load metamorphism prior to the folding episodes ( De Swardt & Rowsell 1974 ; Shone 1983 : 125 ) . Characteristic rock types are metaquartzites and ...
Page 12
... rocks are likely to be older than the Ashgillian age proposed for rocks of the Upper Table Mountain Group ( cf. Cocks et al . 1970 ) . The granite outcrops west of Sardinia Bay have not yet been dated but , if sufficiently fresh ...
... rocks are likely to be older than the Ashgillian age proposed for rocks of the Upper Table Mountain Group ( cf. Cocks et al . 1970 ) . The granite outcrops west of Sardinia Bay have not yet been dated but , if sufficiently fresh ...
Page 21
... rocks than is the case in younger strata and sediments , where the organisms responsible for producing the traces can be more readily identified and their behaviour more easily correlated with changes in the govern- ing conditions ...
... rocks than is the case in younger strata and sediments , where the organisms responsible for producing the traces can be more readily identified and their behaviour more easily correlated with changes in the govern- ing conditions ...
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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