Volume 1, Number 1, 1967

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https://researchcommons.waikato.ac.nz/handle/10289/9089

This collection contains all the articles from Volume 1, Number 1, 1967 of the Earth Science Journal.

Now showing 1 - 5 of 12

Coverpage and Contents
(Journal Article, Waikato Geological Society, The University of Waikato, 1967) Waikato Geological Society
Coverpage and Contents of Volume 1, Number 1, 1967 Earth Science Journal.
Editorial
(Journal Article, Waikato Geological Society, The University of Waikato, 1967) Waikato Geological Society
The production of yet another new journal requires some explanation although there need be no apology. The Earth Science Journal is intended to answer the need, caused by increasing specialisation by other journals, for a place in which to publish articles and research reports which are of wide interest to earth scientists, and which cross the boundaries of the traditional disciplines. To this end contributions of reports on research, essays, notes and letters will be welcomed from geologists, geomorphologists, pedologists, climatologists, oceanographers, ecologists and physical geographers.
The climate of the Waikato Basin
(Journal Article, Waikato Geological Society, The University of Waikato, 1967) de Lisle, J.F.
The topography of the Waikato Valley and its position in relation to the large-scale weather system give it warm humid summers, mild winters and a moderate rainfall with a winter maximum. Some typical meteorological situations affecting the valley are described and the individual climatic elements are considered in detail.
Volcanic ash beds in the Waikato district
(Journal Article, Waikato Geological Society, The University of Waikato, 1967) Pullar, W.A.
This report lies somewhere between the "pathfinder" variety and the completed account for the reason that the results of detailed mapping and identification are still being prepared for publication. For the younger beds less than 36,000 years we now know both the source and the distribution, but for the older ashes commonly referred to as the Hamilton ash, sources are unknown and a knowledge of distribution restricted to the Waikato district. The principal source is the Okataina volcanic centre with Taupo as a subsidiary (Healy, 1964; Thompson, 1964 :44), and on this information, current mapping into the Waikato district proceeds from the east. Under the circumstances of partly completed work it seems prudent to discuss relevant ash beds already known (Vucetich and Pullar, 1963:65-6; 1964:45-6) to introduce briefly current work by the same authors and by W. T. Ward, and then to relate all of this to previous work portrayed in a soil-forming ash shower map by Taylor (1953).
Note on the occurrence of Taupo pumice in the Hamilton basin
(Journal Article, Waikato Geological Society, The University of Waikato, 1967) Tonkin, Philip J.
The presence of a thin layer of pumice lapilli and ash close to the surface of the Rukuhia and Moanatuatua peat bogs was recorded by Grange and Taylor (1939). Since this time a similar band of pumice has been noted in many of the other peat areas in the Hamilton basin. In the undeveloped fibrous peats of the Woodlands bog a layer of pumice lapilli 2 to 3 inches thick occurs at a depth of 18 to 20 inches from the surface. This is similar to the observations of Grange and Taylor. In the more loamy peats the pumice layer is predominantly fine ash and any lapilli present are extremely weathered and crush easily. In the fibrous peats it is thought that the fine ash that fell on the bog surface soon dispersed in the loose network of dead material, whereas the lapilli were of sufficient size to be trapped. In the loamy peats more active weathering took place in an acid environment as the organic matter was breaking down. This made the lapilli very fragile, so with drainage and compaction of the peat the lapilli were very soon crushed to fine ash size.

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