Journal and Proceedings of
The Royal Society of New South Wales
Volume 114 Parts 1 and 2 [Issued September, 1981]
CONTENTS
| AUTHORS & TITLES | PAGES |
| Lomb, N.R., Precise Observations of Minor Planets during 1980 | 1-5 |
| Gerstel, M.D. and Basden, K.S. A Preliminary Study of Polynuclear Hydrocarbons in the Sydney Atmosphere | 7-16 |
| Korsch, R.J., Deformational History of the Coffs Harbour Block | 17-22 |
| Facer, R.A., Formation of "Beach Bubbles" on Quartz Sand Beaches of the Illawarra Coast, New South Wales | 23-27 |
| Martin, Helene, A., An Early Cretaceous Age for Subsurface Pilliga Sandstone in the Spring Ridge District, Mooki Valley | 29-31 |
| Address By His Excellency The Right Honourable Sir Zelman Cowen, A.K., G.C.M.G., G.C.V.O., K.St.J., Q.C., Governor-General of the Commonwealth of Australia, on the Occasion of the Annual Dinner of The Royal Society of New South Wales at the Hilton Hotel, Sydney, Friday, 6 March 1981 | 33-36 |
| Gibbons, G.S., History in Walls | 37-42 |
pp.1-5
Precise Observations of Minor Planets during 1980
N.R. Lomb
Abstract. Positions of 2 Pallas, 3 Juno, 6 Hebe, 7 Iris, 18 Melpomene, 40 Harmonia, 51 Nemausa and 532 Herculina obtained with the 23 cm camera are given.
pp.7-16
A Preliminary Study of Polynuclear Hydrocarbons in the Sydney Atmosphere
M.D. Gerstel and K.S. Basden
Abstract. Samples of suspended particulate matter collected over ten periods each of 24 hours during October, 1979, were segregated into five size fractions by a cascade impactor attached to the hi-vol sampler. These fractions have been analysed quantitatively for benzo[a]pyrene and qualitatively for 19 other polynuclear aromatic hydrocarbons. The results are compared with other published data for Melbourne and several cities in North America. Certain trends in the results are reported; namely the benzo[a]pyrene, as concentration in the atmosphere, is associated with the finest size fractions as is to be expected from other reports in the literature. However, when the results are expressed as concentration per unit mass of particulate matter, the highest concentration is in a larger size fraction, i.e. the 1.5 to 1.5 pm or 4.0 to 1.5 pm, (aerodynamic diameter) size. The concentration of benzo[a]pyrene in the atmosphere increases as the concentration of suspended particulate matter decreases, and the number of other polynuclear aromatic hydrocarbons tend to increase as suspended particulate matter decreases. Another observation is that the benzo[alpyrene concentration in the Sydney air-shed is the highest of that of the other cities reported, and is approached only by Hamilton, Ontario, which is an industrial city containing metallurgical industries. This result also appears to be supported by earlier-published data for Sydney. The analytical method, which involves thin layer chromatography (TLC) also is discussed.
pp.17-22
Deformational History of the Coffs Harbour Block
R. J. Korsch
Abstract. Within the Coffs.Harbour Block three Permian deformational episodes have been identified, two being expressed on the mesoscopic scale and the third being obvious only on the macroscopic scale. The first deformation, D1, produced upright mesoscopic folds in bedding and an associated axial-surface cleavage. Structures of this phase clearly increase in intensity of deformation towards the south of the block, and are accompanied by an increase in the mineralogical grade of regional metamorphism. The second deformation, D2, although widespread, was not as intense as the first but formed gentle flexures, kinks and chevron folds. The distribution of lithologic units and mesoscopic structures suggests that the Coffs Harbour Block as a whole is a complex macroscopic syncline which developed at a late stage after the D1 and D2 deformations.
pp.23-27
Formation of "Beach Bubbles" on Quartz Sand Beaches of the Illawarra Coast, New South Wales
R. A. Facer
Abstract. Gentle mounds or "beach bubbles" have been observed on several quartz sand beaches of the Illawarra district of New South Wales. These mounds or sand domes are generally 50mm to 15Omm across and occur as intact (non-breached) crusts up to 20mm thick over a domed cavity as much as 1Omm high. The sand of the "beach bubbles" is indistinguishable on the basis of sieve analysis data from the other surface sand of the beach. "Beach bubbles" develop near the top of the swash line on gently sloping beaches, but under a variety of tidal and wave conditions. Development apparently occurs by uplift of a crust of sand by air not being able to escape through the wet sand during and immediately following backwash. Preservation of these transient features – they generally collapse and re-establish in a different site after successive waves – would require very special conditions.
pp.29-31
An Early Cretaceous Age for Subsurface Pilliga Sandstone in the Spring Ridge District, Mooki Valley
Helene A. Martin
Abstract. The palynology of the supposedly Jurassic Pilliga Sandstone at Spring Ridge, one of the most easterly outcrops of this unit, shows that it is Early Cretaceous, and not Jurassic. Lithologically and hydrologically, the sandstone at Spring Ridge is very like the Pilliga Sandstone. Two likely explanations for this discrepancy are discussed.
Some Tertiary assemblages, most likely Late Oligocene have been found beneath the basalts of the Liverpool Range Beds.
pp.33-36
Address By His Excellency The Right Honourable Sir Zelman Cowen, A.K., G.C.M.G., G.C.V.O., K.St.J., Q.C., Governor-General of the Commonwealth of Australia, on the Occasion of the Annual Dinner of The Royal Society of New South Wales at the Hilton Hotel, Sydney, Friday, 6 March 1981
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pp.37-42
History in Walls
G.S. Gibbons
Abstract. Chronologies can be established for a wide variety of inorganic building materials from Colonial and Victorian times. The work requires co-operation between materials scientists, architects, historians, and archaeologists. Some of the changes followed on developments overseas, some from the particular range of materials available within the Colony, and some from the social environment of the times. Using physical, chemical, and mineral analysis of such materials as bricks, plasters and paints, materials studies link up with architectural documentation and research on historical archives, to provide a clearer understanding of both the social and architectural development of Australia.