Annals of the South African Museum, Volume 101, Issue 2 |
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Page 11
Restricted bioto -shallow marine sediment - dwellers INNER SHELF
MEGARIPPLE FACIES INNER SHELF MUD AND SAND SHELF SAND WAVE
FACIES deposited by tidal currents with a degree of time - velocity_symmetry
INNER SHELF ...
Restricted bioto -shallow marine sediment - dwellers INNER SHELF
MEGARIPPLE FACIES INNER SHELF MUD AND SAND SHELF SAND WAVE
FACIES deposited by tidal currents with a degree of time - velocity_symmetry
INNER SHELF ...
Page 23
The innermost 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 pyrite , a possible indicator of anoxic and hypersaline ...
The innermost 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 pyrite , a possible indicator of anoxic and hypersaline ...
Page 24
Anoxic conditions could have arisen in this zone as a result of reduced circulation
, and this could be reflected in the restricted ichnofauna ( Skolithos and ?
Fascifodina ) . The extensive bioturbation that occurred probably indicates long -
term ...
Anoxic conditions could have arisen in this zone as a result of reduced circulation
, and this could be reflected in the restricted ichnofauna ( Skolithos and ?
Fascifodina ) . The extensive bioturbation that occurred probably indicates long -
term ...
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Common terms and phrases
abbreviated animals anoxic appear areas author's name authors base bedding surface bioturbated branching burrows Cape capital Chondrites circulation cm Fig colonization contain correlation Cruziana Cruziana ichnofacies model dark pyritic deposited depositional environment described Description designated diameter Diplocraterion energy environment epeiric sea example facies Fascifodina Figure follow formed Frey & Pemberton Häntzschel 1975 horizontal hypersaline conditions illustrations indicate individual Interpretation interval italics known letters lining marking MUD AND SAND mudrock Note occur Ophiomorpha organisms origin parentheses Pemberton 1984 Photograph Planolites possible probably punctuation pyritic range reduction references represent resemble response restricted rocks rounded SAND sand-filled tubes sandstone Sardinia Bay Formation sediment sediment-dwelling sedimentary structures separates shafts Shone showing similar Skolithos Skolithos ichnofacies Smith SOUTH AFRICAN MUSEUM species Spreiten strata substrate suggest Table Table Mountain Group Thalassinoides tidal currents trace fossil association typical U-tube units Upper vermiform vertical wave weathering