Petrology of the lower Mesozoic rocks of the Wellington district

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Reed, J.J. 1957 Petrology of the lower Mesozoic rocks of the Wellington district. Wellington: Government Printer. New Zealand Geological Survey bulletin 57 59 p.

Abstract: The lower Mesozoic rocks of the Wellington district are composed of greywackes (sandstones) and argillites (siltstones) with locally abundant conglomerates and intercalated submarine spilitic lavas, red and green volcanic argillites, jaspers, and grey cherts. Very little petrological work has been done on the rocks of the Wellington district. The present study started from an attempt to determine a relation between the chemical and mineral composition of the parent rock and the soil types in the Wellington district. Rock samples for this purpose were collected from places where the soil appeared to be derived from Mesozoic basement rocks. The petrological investigation was later greatly expanded and widened to include all the lower Mesozoic rock types. (auth/DG)