Sedimentation of the alternating greywacke and argillite strata in the Porirua district

B. D. Webby

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The Lower Mesozoic alternating greywackes and argillites in the Porirua district exhibit graded bedding, lamination, convolute lamination, cross lamination, mud flakes, and current markings. The sediments, rapidly derived from a plutonic terrain, were rapidly transported and deposited by turbidity currents in the New Zealand Geosyncline. The orientation of cross lamination and Current markings suggests that the turbidity currents flowed north-north-east, sub-parallel to the present regional tectonic trend. At Porirua, sedimentation was in deep water, a considerable distance from the supplying land mass, and not far from the axis of the geosyncline.

Original languageEnglish
Pages (from-to)461-478
Number of pages18
JournalNew Zealand Journal of Geology and Geophysics
Volume2
Issue number3
DOIs
Publication statusPublished - 1959
Externally publishedYes

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