Annals of the South African Museum, Volume 101, Issue 2 |
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Page 11
Simplified stratigraphic section of the Sardinia Bay Formation showing facies
interpretations and units containing trace fossils . VERTICAL FACIES CHANGES
AND DEPOSITIONAL MODEL The 180 m thick Sardinia Bay Formation ( sensu ...
Simplified stratigraphic section of the Sardinia Bay Formation showing facies
interpretations and units containing trace fossils . VERTICAL FACIES CHANGES
AND DEPOSITIONAL MODEL The 180 m thick Sardinia Bay Formation ( sensu ...
Page 14
... to be the dwelling burrows of callianassid decapods ( Häntzschel 1975 : W117
) or crabs ( Radwanski 1977 : 233-235 ) . 5cm Fig . 5. Partly weathered burrows
showing initial erosion of burrow lining and eventual excavation of fill and lining .
... to be the dwelling burrows of callianassid decapods ( Häntzschel 1975 : W117
) or crabs ( Radwanski 1977 : 233-235 ) . 5cm Fig . 5. Partly weathered burrows
showing initial erosion of burrow lining and eventual excavation of fill and lining .
Page 21
South African Museum. 5cm Fig . 12. Weathered surface of a mudrock unit
showing disseminated pyrite now altered to limonite ( dark nodules ) and short ,
gently curved burrows with rounded ends ( arrowed ) , which resemble Planolites
.
South African Museum. 5cm Fig . 12. Weathered surface of a mudrock unit
showing disseminated pyrite now altered to limonite ( dark nodules ) and short ,
gently curved burrows with rounded ends ( arrowed ) , which resemble Planolites
.
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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