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

Research output: Contribution to journalArticleResearchpeer-review

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.

LanguageEnglish
Pages461-478
Number of pages18
JournalNew Zealand Journal of Geology and Geophysics
Volume2
Issue number3
DOIs
Publication statusPublished - 1959
Externally publishedYes

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argillite
graywacke
lamination
strata
laminates
geosynclines
sedimentation
geosyncline
turbidity
turbidity current
marking
mud
supplying
flakes
New Zealand
deep water
tectonics
sediments
trends
sediment

Cite this

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title = "Sedimentation of the alternating greywacke and argillite strata in the Porirua district",
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.",
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journal = "New Zealand Journal of Geology and Geophysics",
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}

Sedimentation of the alternating greywacke and argillite strata in the Porirua district. / Webby, B. D.

In: New Zealand Journal of Geology and Geophysics, Vol. 2, No. 3, 1959, p. 461-478.

Research output: Contribution to journalArticleResearchpeer-review

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AB - 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.

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