Sedimentology of the Waitemata Group in the Stanley Point - Devonport area, Auckland, New Zealand
作者:
BrianG. Jones,
期刊:
New Zealand Journal of Geology and Geophysics
(Taylor Available online 1969)
卷期:
Volume 12,
issue 1
页码: 215-247
ISSN:0028-8306
年代: 1969
DOI:10.1080/00288306.1969.10420235
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
This paper presents a further detailed stratigraphic column showing the alternating sequence of sandstones and siltstones of the Lower Miocene Waitemata turbidite sediments. Descriptions of the sedimentary features, current direction indicators, grain size analyses, petrology, and trace fossils are given especially with regard to their use as possible correlation factors. The use of a model relating current direction variation within an expanding lobate turbidity current is discussed, together with its application for determining axial flow direction of the turbidity current and the direction of thickening of the turbidite sandstone. It is concluded that the best possible method of correlating the uniform sequence of unfossiliferous sediments available at present is by means of close spaced detailed stratigraphic columns together with graphs of sandstone-siltstone ratio and bed thickness variations with respect to stratigraphic height.
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