The southwest pacific area during the last 90 million years

Abstract
Maps of the southwest Pacific area at 90, 60, 53, 83, 29, 21, and 10 m.y. are accompanied by brief descriptions of the data and palaeogeographic developments in each major area within the region. There are four stages in. the regional palaeogeographic development: These developmental stages cannot be adequately explained by interaction between the Pacific and Australian crustal plates. A comprehensive explanation is given using the zonal spreading model proposed by Crook (1977).