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Summary The concept of thresholds in geomorphology is developed with reference to several different systems. Thresholds are classified as transitive or intransitive, according to whether a change of geomorphic state or process is caused by a persistent change of external boundary conditions or...
Summary Glacial diversion of the Nelson River into a limestone floored valley promoted karst development. This diversion occurred prior to the Last Glacial Stage. Outwash gravels of pre‐Last Glacial age are preserved within a meander cutoff cave and indicate cavern infilling and only minimal...
Summary The Astrolabe Agglomerate, a unit of volcanic rocks consisting mainly of pyroclastics with a few lavas at the top, is used to estimate the former extent of a landsurface of low relief in eastern P.N.G. The pyroclastics are of flow origin, but consist mainly of large rounded and...
Summary A direct linear transformation method was used to locate the position of high tide run‐up from oblique and vertical aerial photographs of Stanwell Park beach, N.S.W. between 1890–1980 on a plan map accurate to ± 2.5 m. Results indicate minor net erosion of less than 5 m over these ninety...
Summary In 1974 the N.S.W. government rejected a recommendation to carry out a general reform of local boundaries, choosing, instead, a piecemeal approach to be conducted through the Local Government Boundaries Commission (LGBC). By 1981 there had been far‐reaching changes affecting most of the...
WHY CITIES CHANGE: Urban Development and Economic Change in Sydney edited by R. Cardew, J. Langdale and D. Rich. 21 × 14 cm, 307 pages, tables, text figures. Allen and Unwin ‐‐ Sydney 1982 (ISBN 0 86861 260 X) $A11.95 limp
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