Volume 5, Number 2, 1971
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This collection contains all the articles from Volume 5, Number 2, 1971 of the Earth Science Journal.
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Item Coverpage and Contents(Journal Article, Waikato Geological Society, The University of Waikato, 1971) Waikato Geological SocietyCoverpage and Contents from Volume 5, Number 2, 1971 of Earth Science Journal.Item Notice from the Editor(Journal Article, Waikato Geological Society, The University of Waikato, 1971) Selby, Michael J.Notice from the Editor from Volume 5, Number 2, 1971 of Earth Science Journal.Item Volcanic studies by members of the Royal Society of London 1665 - 1780(Journal Article, Waikato Geological Society, The University of Waikato, 1971) Stokes, EvelynLate seventeenth century ideas about volcanic activity were largely derived from classical sources. The Philosophical Transactions of the Royal Society of London provided a vehicle for publication of information about volcanoes where many ancient notions were refuted and new hypotheses suggested. Volcanic studies by members included detailed field reports, eyewitness accounts of eruptions as well as expeditions to extinct or dormant volcanic peaks, experiments with volcanic rocks, and speculation on the nature of subterranean "fires" and causes of eruptions. The development of theories concerning the formation of the columnar basalts of the Giant's Causeway is also traced. By the 1770's there appeared a general acceptance among members of the Royal Society of the igneous origin of basalt, the existence of ancient extinct volcanoes and the implications of past geologic change.Item Hydrological factors influencing sediment concentration fluctuations in small drainage basins(Journal Article, Waikato Geological Society, The University of Waikato, 1971) Imeson, A.C.Although sediment concentrations measured in two contrasting streams in East Yorkshire fluctuate in response to similar hydrological factors, the effectiveness of these factors reflects the environmental characteristics of the drainage basins. Consequently, regression relationships used to predict sediment concentrations in individual streams are not directly applicable outside the region in which they were developed. The sensitivity of sediment concentration variations to environmental conditions makes long term estimates of denudation of limited value.Item Mass movement in Tangoio conservation reserve northern Hawkes Bay(Journal Article, Waikato Geological Society, The University of Waikato, 1971) Eyles, R.J.In a random sample of 52 valley-side profiles at Tangoio, mass movements are shown to occur preferentially on profiles with a northerly aspect, which are long, or steeply sloping. Detailed measurements of 27 debris slide and two slump scars dating from a storm in May 1971 enable an estimate of the rate of erosion of loess and volcanic ash from valley-sides to be made. Valley-side slopes are changing from a convexo-concave equilibrium form under the original forest towards a new, more rectilinear equilibrium form under grass.