Abstract

"The rocks of the Dunedin district comprise feldspathic quartz-schists on which rest sandstones and argillaceous mudstones divided by bands of incoherent sand or glauconite. Lavas cover much of the region. Rock-slides in the schist have constricted a river gorge; pipes feeding a hydroelectric generating station have been displaced by the creeping of schist debris; earthflows in mudstone have displaced roadways and railway embankments, and prolonged slumpings have dislocated buildings, a railway tunnel and water supply pipeline, and have produced striking topographic effects. Rates of movement have been determined, and the factors controlling their variation are quantitatively discussed."

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