Annals of the South African Museum, Volume 101, Issue 2 |
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Page 11
SCALE IN METRES 180 FACIES INTERPRETATIONS LEGEND Ossid
Conglomerate Sandstone 150 Mudrock Skolithos Planar cross - beds Skollthos
Fascifoding Low - angle sand wave erosion planes Trough crossbeds F100
SHALLOW ...
SCALE IN METRES 180 FACIES INTERPRETATIONS LEGEND Ossid
Conglomerate Sandstone 150 Mudrock Skolithos Planar cross - beds Skollthos
Fascifoding Low - angle sand wave erosion planes Trough crossbeds F100
SHALLOW ...
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
.
Page 23
Mudrock units in the Sardinia Bay Formation containing disseminated pyrite , a
possible indicator of anoxic and hypersaline conditions ( cf. Berner et al . 1979 ) ,
do in fact include very few identifiable trace fossils . What is puzzling , however ...
Mudrock units in the Sardinia Bay Formation containing disseminated pyrite , a
possible indicator of anoxic and hypersaline conditions ( cf. Berner et al . 1979 ) ,
do in fact include very few identifiable trace fossils . What is puzzling , however ...
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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