Vol. LV., No. 7. 
87 
NOTES ON THE PETRIE SERIES, 
SOUTH-EASTERN QUEENSLAND. 
(With One Text Figure and One Plate.) 
By A. W. Beasley, B.Sc., Department of Geology, University of 
Queensland. 
(. Received 24:th November, 1943; tabled before the Royal Society of 
Queensland, 29th November, 1943; issued separately, 2 6th June, 
1944.) 
CONTENTS. 
Summary. 
I. — Introduction. 
II. — Earth Movements and Igneous Activity. 
III. — The Eastern and North-Eastern Stratigraphical Relationship of the Series. 
IV. — Palaeontology. 
V. — The Strathpine Oil Shale. 
VI. — General Statements and Acknowledgments. 
VII. — References. 
SUMMARY. 
This paper aims at setting out additional information on the Petrie 
Series. The main facts put forward include an account of faulting, both 
tension and compression, within the series. The series is shown to be 
more restricted in area than previously believed, and a Mesozoic age 
for the strata in the Brighton-Redcliffe-Petrie area is determined. New 
fossil localities are described, and a comprehensive account of the fossils 
collected is given. The value of the dicotyledonous leaves, sedges, 
unionids, and ostracods, as criteria of age, is considered, and, from the 
palaeontological evidence accumulated, a provisional Miocene age is 
given to the series. The Strathpine oil shale deposit is described, and 
shown to be generally low grade, restricted in extent, and economically 
of limited value. Fresh-water limestone is recorded, and, from the very 
close resemblance shown on analysis with that from the Silkstone Series, 
an equivalent age (Miocene) is suggested. The abundance of clays, and 
their importance as a possible future source of wealth in the area is 
mentioned. 
I. INTRODUCTION. 
Considering the proximity of the Petrie Series to Brisbane it might 
appear remarkable to find geological work still left to be done in the 
area. This, however, has shown itself to be the case. In fact, the only 
detailed investigation previously conducted in this area has been that 
carried out by 0. A. Jones in 1927. In that year Jones (1927) named 
and described the Petrie Series in a paper entitled “The Tertiary 
Deposits of the Moreton District, South-Eastern Queensland,” As the 
following “Notes” are intended to supplement the above paper reference 
should be made to it for a general account and map of the Petrie Series. 
II. EARTH MOVEMENTS AND IGNEOUS ACTIVITY. 
Although the Petrie Series may be characterised by gently dipping 
beds, the outcrops in the southern portion of the series possess often 
quite high dips. They appear, moreover, in most cases to be associated 
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