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This book has been written by an eminent geologist, examines the development of the earth and promotes the theory of continental drive and expanding earth. The author, after studying seven continents, found that they all exhibit similar sequences of planation, this process starting with the Mesozoic break-up of Gondwanaland and continuing to the present day. Erosional planations have developed similarly although at the surface the continents drifted away from each other. He concludes, there, that all the continents were governed by one global system of uplifts. The exterior of the globe has expanded by the degassing of the mantle which underlines the lithospheric crust and provides a source of energy which is evident in volcanic activity.