Journal and Proceedings of
The Royal Society of New South Wales
Volume 111 Parts 1 and 2 [Issued 14 July 1978]
CONTENTS
| AUTHORS & TITLES | PAGES |
| 1-12 | |
| 13-17 | |
| 19-27 | |
| 29-31 | |
| 33-34 | |
| 35-39 | |
| 41-47 |
Vol 111 parts 1-2 pp.1-12
Proper Motions in the Region of NGC 3532
D. S. King
Abstract. Relative proper motions of stars in the region of the galactic cluster NGC 3532 based on plates taken with the 33 cm astrograph, are determined with the aim of identifying stars in the area of the cluster which are non-members. The relative proper motions have an average standard error of 0."13/century and reveal 265 likely nonmembers and 382 likely members.
Vol 111 parts 1-2 pp.13-17
Stratigraphic and Igneous Units in the Rockvale-Coffs Harbour Region, Northern New South Wales
R. J. Korsch
Abstract. A separate stratigraphic nomenclature is developed for three distinct structural blocks in the Rockyale – Coffs Harbour region of New South Wales, and several units are defined for the first time. In the western Rockyale Block the term Girrakool Beds replaces the invalid term Lyndburst Beds. The Dyamberin Block, located between the Wongwibinda and Demon faults, is subdivided into the Dyamberin Beds and the Sara Beds. In the eastern Coffs Harbour Block the term Coffs Harbour Beds is discarded and the unit is subdivided into the Moombil Beds, Brooklana Beds and Coramba Beds. Four previously undescribed igneous intrusions from the Coffs Harbour Block are also defined.
Vol 111 parts 1-2 pp.19-27
The Geology of Brushy Hill, Glenbawn, New South Wales
Arthur Mory
Abstract. A finer subdivision of the strata at Glenbawn is proposed. The lowest exposed beds are distinguished as the Chateau Douglas Sandstone Member and contain a small conodont fauna suggesting an early Carboniferous age. The remainder of Oversby and Roberts' (1973) Kingsfield Beds, accorded formation status as the Kingsfield Formation, lacks marine fossils and consists in part of red sediment for which non-marine conditions of sedimentation are proposed. Conformably overlying the non-marine sediments is a newly distinguished unit, the Macqueen Formation characterised by a fauna dominated by bivalves, gastropods and rhynchonellid brachiopods. This unit was previously included as the base of Oversby and Roberts' (1973) Dangarfield Formation. Barrier sands of the Wroxley Lithic Sandstone Member (new name) overlain by the Brushy Hill Limestone Member comprise the basal units of the conformably overlying Dangarfield Formation.
The large vertical displacement across the Brushy Hill Fault, in the order of 1000 m, is a result of remobilisation of a pre-existing NNW trending fault, subsequent to all other deformational events in the area.
Vol 111 parts 1-2 pp.29-31
A q-Expansion Formula
B.M. Agrawal and Virendra Kumar
Abstract. An extension of a q-expansion formula of Carlitz is obtained for an analytic function, and is illustrated by some simple special cases.
Vol 111 parts 1-2 pp.33-34
A Carboniferous Echinoid Archaeocidaris sp. indet. from New South Wales
Graeme M. Philip
Abstract. A specimen of Archaeocidaris sp. indet. from the Lower Carboniferous of New South Wales is illustrated and described.
Vol 111 parts 1-2 pp.35-39
Silurian Conodonts from Blowclear and Liscombe Pools, New South Wales
John Pickett
Abstract. Conodont assemblages indicate a Late Llandoverian age for the Liscombe Pools Limestone, and a Middle Ludlovian age for the strata probably referable to the Milpose Volcanics.
Vol 111 parts 1-2 pp.41-47
Lead in the Environment
D. J. Swaine
[Presidential Address delivered to the Royal Society of New South Wales at the Science Centre, Clarence Street, Sydney on 6 April, 1977]
Abstract. Various aspects of the geochemistry of lead are discussed in terms of the geochemical cycle. Values are given for concentrations of lead in rocks, soils, water, vegetation, coals, and fertilisers. Lead tends to be concentrated in surface soils, probably because of the insolubility of the common lead minerals and of the lead complexed with some forms of organic matter. The same properties also govern the general unavailability of lead to plants and the low concentrations of lead in natural waters. Lead in solution in waters and lakes also depends on reactions at the sediment-water interface and on the pH and oxidation-reduction potential. The mean content of lead in coal is about 10 ppm Pb, and most of this is retained with fly-ash after the combustion of pulverised coal. The sources of lead in the body are also discussed. Pollution is seen as something imposed on a natural background; the proper assessment of the effects of lead and other heavy metals depends on reliable geochemical data and on careful interpretation.