Journal and Proceedings of
The Royal Society of New South Wales
Volume 109 Parts 3 and 4 [Issued 16 December, 1976]
CONTENTS
| AUTHORS & TITLES | PAGES |
| Morgan, T.L., Precise Observations of Minor Planets at Sydney Observatory During 1975 | 71-76 |
| Robertson, W.H., Proper Motions in the Region of NGC 6025 | 77-80 |
| Scholer, H.A., Discharge of Sands by Sandy Bed Streams and the Regime of Leveed Rivers in Coastal Flood Plains with Special Reference to Rivers in Eastern New South Wales | 81-89 |
| Wasson, R.J., Holocene Aeolian Landforms in the Belarabon Area, S.W. of Cobar, N.S.W. | 91-101 |
| Hellman, Phillip L., Geology Structural Analysis of the Albury District, N.S.W. | 103-113 |
| Drake, Lawrence, Seismic Risk in Australia | 115-121 |
| Morris, S.A., Connected and Locally Connected Closed Subgroups of Products of Locally Compact Abelian Groups | 123-124 |
| Webby, B.D. and Morris D.G., New Ordovician Stromatoporoids from New South Wales | 125-135 |
| Martin, Raymond L., Coordination, Topology and Structure in Transition Metal Oxides [Liversidge Lecture for 1976] |
137-150 |
| Birch, A.J., Sir Robert Robinson: A Contemporary Historical Assessment and a Personal Memoir | 151-160 |
Vol 109 pts 3-4, pp.71-76
Precise Observations of Minor Planets at Sydney Observatory During 1975
T.L. Morgan
Abstract. Poisitions of 2 Pallas, 4 Vesta, 6 Hebe, 7 Iris, 389 Industria, 433 Eros and 532 Herculina obtained with the 23 cm camera are given.
Vol 109 pts 3-4, pp.77-80
Proper Motions in the Region of NGC 6025
W.H. Robertson
Abstract. Proper motions of stars in the region of the galactic cluster NGC 6025 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.
Vol 109 pts 3-4, pp.81-89
Discharge of Sands by Sandy Bed Streams and the Regime of Leveed Rivers in Coastal Flood Plains with Special Reference to Rivers in Eastern New South Wales
H. A. Scholer
Abstract. A formula is derived for the discharge of sands in a sandy bed stream. This formula is valid for all streams wherein the concentration of suspended sediment is less than 4000 parts per million. This formula is combined with a representative flood discharge hydrograph and a flood frequency relationship to obtain an expression for the average annual discharge of sand by an upland sandy bed stream without levees. The application of this expression requires only limited flood records and field observations.
The formation of leveed channels in flood plains is described. Relationships and formulae used above are extended to obtain expressions for the regime levels of the levee crests and the beds of the channels. These expressions are based on the assumption that the height of the levees and the width and depth of a leveed channel are determined by:
- the average annual quantity of sand supplied by the upland stream and
- the proportion of fine sediment in the total average annual supply of sediment.
From these expressions changes in the levels of levee; crests and the bed of a channel, due to changes in sediment supply, can be computed. In certain cases, the general trends of changes in sediment supply can be inferred from these expressions without computation. These general trends have been tabulated.
Vol 109 pts 3-4, pp.91-101
Holocene Aeolian Landforms in the Belarabon Area, S.W. of Cobar, N.S.W.
R. J. Wasson
Abstract. A now relict dunefield and small sandsheets formed in the Belarabon area during the Upper Holocene. The origin of the Dunefield is suggested by comparing the Belarabon dunes in the Simpson Desert. The model of Simpson Desert dune development presented by Twidale (1972) applies to the Belarabon dunes. A phase of mid-Holocene alluviation occurred under climatic conditions which produced more runoff than is presently available. This alluvium was the source of the aeolian landforms which formed under dry conditions in the late-Holocene. The dunes have been stabilized by the present vegetation.
Vol 109 pts 3-4, pp.103-113
Structural Analysis of the Albury District, N.S.W.
Phillip L. Hellman
Abstract. A turbidite sequence of pelites, psammopelites and psammites in the Albury district of New South Wales has been subjected to three tectonic deformations. The first deformation produced easterly striking and gently plunging upright folds. The second deformation varied in intensity across the area studied. In the west the deformation was expressed as a simple overprinting which resulted in widespread lineation on the limbs of earlier folds. To the east, where the deformational intensity was strongest, the structure resulting from the first deformation was rotated and refolded into tight isoclinal superposed folds. A zone of transition defined by a shallow plunging reclined fold exists between the areas of imprinted lineation and superposed folding. The third deformation consisted of late-stage kinking. Low pressure regional metamorphism reached its peak between the first two deformations. The area is considered unique in that the trend of the first deformation in the western part of the Albury district is normal to the regional trend of the Lachlan Fold Belt. Evidence is provided for the existence of a major lineament which is possibly related to the south south-east trending faults in the Kiewa River district of Victoria.
Vol 109 pts 3-4, pp.115-121
Seismic Risk in Australia
Lawrence Drake
Abstract. The magnitude of an earthquake is a measure of the total elastic wave energy radiated by that earthquake. Attenuation of seismic waves in eastern United States and Australia is less than it is in southern California, and the magnitudes of some earthquakes in Australia have been overestimated. This paper presents the results of a correlation of published magnitudes of Australian earthquakes with the ground motion caused by these earthquakes at Riverview Observatory. From the resulting table of magnitudes of Australian earthquakes, some approximate estimates of seismic risk are made. An earthquake of magnitude 6.8 can be expected to occur under Perth less than once in a million years and an earthquake of magnitude 6.2 can be expected to occur under Sydney less than once in 500 000 years. An earthquake of magnitude 5.8 can be expected to occur close to Adelaide once in 100 years and an earthquake of magnitude 5.5 can be expected to occur in the region between Yass and Picton, New South Wales, once in 20 years.
Vol 109 pts 3-4, pp.123-124
Connected and Locally Connected Closed Subgroups of Products of Locally Compact Abelian Groups
S.A. Morris
Abstract. It is shown that any connected or locally connected closed subgroup of a product of locally compact abelian groups is topologically isomorphic to a product of locally compact abelian groups.
Vol 109 pts 3-4, pp.125-135
New Ordovician Stromatoporoids from New South Wales
B.D. Webby and D.G. Morris
Abstract. Six species of stromatoporoids – three clathrodictyids and three cliefdenellids – are described from the late Ordovician of central New South Wales. Among the forms are new species Cliefdenella perdentata, Ecclimadictyon cribratum and Plexodictyon? cascum. The Plexodictyon-like forms are recorded for the first time from the late Ordovician. An outline of the stratigraphic distribution of the clathrodictyids and cliefdenellids in the N.S.W. Ordovician succession is also presented.
Vol 109 pts 3-4, pp.137-150
Coordination, Topology and Structure in Transition Metal Oxides
Raymond L. Martin
[Liversidge Lecture delived before the Royal Society of New South Wales, 15th July 1976]
Abstract. The role of defects in the real structure of transition metal oxides which exhibit gross departures from simple stoicheiometries is reviewed. The classical notion of a randomized distribution of non-interacting point defects is no longer tenable being replaced by the emerging recognition that a high level of organization into discrete clusters or more extended assemblies of defects is an inherent feature of the real structure of defect solids. The concept of octahedral coordination of vacant oxygen sites, taken in conjunction with topological analysis, is shown to contribute considerable insight into the transformational and structural relationships between defect oxides of the fluorite type.
Vol 109 pts 3-4, pp.151-160
Sir Robert Robinson: A Contemporary Historical Assessment and a Personal Memoir
A. J. Birch
[Introductary paragraphs] Seldom in a scientific discipline does the work of one man epitomise that of several generations. Sir Robert Robinson's long life spanned a vital period of organic chemistry when it was rapidly changing from a mostly empirical science into one soundly based on theory. To that change, he was an outstanding contributor in four most important areas: natural product structures, biosynthesis, organic reaction mechanisms and organic synthesis. For this reason his work belongs to the ages, and it is fitting to examine, for the future, not only the great deal which went right, but also what occasionally went wrong and why.
Although his work covered a number of fields, it was unified by his strong feeling for reaction mechanisms. His mechanistic theories were basic for his work on both synthesis and biosynthesis. They also greatly assisted his determinations of natural product structures at a time when such investigations involved interpretations of the results of reactions. To complete the circle, biosynthesis and structure determinations were mutually supporting.