Vol. LVI, No. 11. 
95 
OSTRACODS FROM SOME QUEENSLAND TER- 
TIARY BASINS, AND THEIR BEARING 
ON THE CORRELATION OF THE STRATA. 
By A. W. Beasley, M.Sc., Department of Geology, University of 
Queensland. 
(With Plate YI. and one text-figure.) 
{Received 23 rd November ; accepted for publication, 11th December, 
1944; issued separately, 29th June, 1945.) 
Summary 
Part I. Introduction 
Introductory and Historical 
The Value and Limitations of the Queensland Tertiary Ostracods 
Part II. Systematic Descriptions 
Part III. Correlation of Deposits 
A. The Narrows — 
General Aspects 
Species Occurrence Chart Lists 
Zonal Correlations 
Discussion 
B. Petrie Series — 
General Aspects 
Discussion 
C. Baffle Creek — 
General Aspects 
Discussion 
Part IV. General Conclusions 
F Acknowledgments 
Bibliography 
!. 
SUMMARY. 
This paper indicates the present and the potential value of the 
Ostracoda in Queensland Tertiary stratigraphy. The ostracods contained 
in samples from eight boreholes in The Narrows Tertiary basin are 
described, and shown to be of value in enabling a zonation and approxi- 
mate correlation of the strata to be drawn up. Ostracods from the Petrie 
Series and the Baffle Creek Tertiaries are also described, and the faunas 
compared with those of The Narrows Tertiaries and the Redbank Plains 
Series. As the result of this work, a probable Miocene age is suggested 
for both The Narrows Tertiaries and the Petrie Series, and a probable 
Oligocene age for the Baffle Creek Tertiaries and the Redbank Plains 
Series. The environmental conditions of deposition and origin of the 
ostracod-bearing shales in the'se basins, together with other related data, 
are discussed. 
PART I.— INTRODUCTION. 
Introductory and Historical. 
The most abundant of the microfossils that have been found in the 
Tertiary shales of Queensland are the Ostracoda. They are sometimes so 
abundant, and other fossils are so rare, that a palaeontological study of 
the strata is virtually a study of the contained ostracods. 
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