Annals of the South African Museum, Volume 101, Issue 2 |
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Page 12
... of the linings can be discerned ( Shone 1983 : 241-242 ) . No clearly defined
branching of the tubes has been observed , but strata adjacent to the vertically
burrowed horizons contain numerous branching sub - horizontal burrows ...
... of the linings can be discerned ( Shone 1983 : 241-242 ) . No clearly defined
branching of the tubes has been observed , but strata adjacent to the vertically
burrowed horizons contain numerous branching sub - horizontal burrows ...
Page 14
These burrows often show repeated branching ( Fig . 5 ) . Burrow diameters
range from 2 to 10 cm and individual shaft sections are up to 50 cm long .
Inclined shafts may run parallel to foreset surfaces in the cross - bedded
sandstone .
These burrows often show repeated branching ( Fig . 5 ) . Burrow diameters
range from 2 to 10 cm and individual shaft sections are up to 50 cm long .
Inclined shafts may run parallel to foreset surfaces in the cross - bedded
sandstone .
Page 18
The vermiform burrows from the Sardinia Bay Formation could also be the result
of interfering Chondrites burrows , but apparently lack the repeated branching
characteristic of Chondrites . Fascifodina has been interpreted variously as the ...
The vermiform burrows from the Sardinia Bay Formation could also be the result
of interfering Chondrites burrows , but apparently lack the repeated branching
characteristic of Chondrites . Fascifodina has been interpreted variously as the ...
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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