"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."

First Page Preview

First page PDF preview
You do not currently have access to this article.