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Ludbrook, N. H. (1966). Cretaceous biostratigraphy of the Great Artesian Basin in South Australia. Bulletin of the Geological Survey of South Australia. 40: 1-223.
359159
Ludbrook, N. H.
1966
Cretaceous biostratigraphy of the Great Artesian Basin in South Australia
Bulletin of the Geological Survey of South Australia
40: 1-223.
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After its formation as a single sedimentary entity the Great Artesian Basin provided a marine environment only during the Cretaceous Aptian, Albian and early Cenomanian in South Australia. Santos' Oodnadatta 1 well (1957), continuously cored through the early Cenomanian-Aptian section, gave valuable control of the sequence of and relationships between foraminiferal and molluscan faunas.
Material studied for this report was obtained from 255 surface samples, collected mostly between 1957 and 1963, and from retained drill cores and cuttings of 16 petroleum exploration wells and water bores dating back as far as 1883.
The foraminifera consist of 134 species, 66 of which are described as new, representing 57 genera, two of which are new; the molluscs consist of 88 species, 18 described as new, belonging to 43 genera of which two are new. The assemblages show little variation over wide areas and indicate deposition under sluggish or stagnant conditions ranging from brackish swamp to offshore facies. Four foraminiferal zones are recognizable.
The faunas cross formation boundaries near the base of the marine sequence, giving evidence of marine transgression in a westerly direction during the Aptian.
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Gari forbesi Ludbrook, 1966 † accepted as Laevicanotia forbesi (Ludbrook, 1966) † (original description)
Gari whitehousei Ludbrook, 1966 † accepted as Laevicanotia whitehousei (Ludbrook, 1966) † (original description)
Isoarca heathi Ludbrook, 1966 † (original description)
Nucula etheridgei Ludbrook, 1966 † accepted as Leionucula quadrata (Etheridge, 1872) † (original description)
Nuculana algebuckinensis Ludbrook, 1966 † (original description)
Yoldia freytagi Ludbrook, 1966 † accepted as Neilo elongata (Etheridge, 1872) † (original description)
Gari whitehousei Ludbrook, 1966 † accepted as Laevicanotia whitehousei (Ludbrook, 1966) † (original description)
Isoarca heathi Ludbrook, 1966 † (original description)
Nucula etheridgei Ludbrook, 1966 † accepted as Leionucula quadrata (Etheridge, 1872) † (original description)
Nuculana algebuckinensis Ludbrook, 1966 † (original description)
Yoldia freytagi Ludbrook, 1966 † accepted as Neilo elongata (Etheridge, 1872) † (original description)
South Australia (state) for Gari forbesi Ludbrook, 1966 †
South Australia (state) for Gari whitehousei Ludbrook, 1966 †
South Australia (state) for Isoarca heathi Ludbrook, 1966 †
South Australia (state) for Nuculana algebuckinensis Ludbrook, 1966 †
South Australia (state) for Yoldia freytagi Ludbrook, 1966 †
South Australia (state) for Gari whitehousei Ludbrook, 1966 †
South Australia (state) for Isoarca heathi Ludbrook, 1966 †
South Australia (state) for Nuculana algebuckinensis Ludbrook, 1966 †
South Australia (state) for Yoldia freytagi Ludbrook, 1966 †
