CONTENTS
I. THE ESSENTIALS OF THE DISPLACEMENT THEORY
CHAPTER I
The Displacement Theory |
1 |
The congruency of the South Atlantic coasts as the starting-point of the Displacement Theory. The drifting movement of the individual continents. Reconstructed maps of the earth (Figs. 1 and 2 on pp. 6 and 7). Special kind of movement of India. Folding on the anterior margin of the drifting blocks. Westward drift of the continents. The drift from the poles. The lag of the island festoons. Continental blocks and the floors of the oceans. Historical notes. Approximations to the Displacement Theory by previous writers.
CHAPTER II
Relation to the Contraction Theory, and to the Doctrines of Land-Bridges and of the Permanence of the Oceans |
11 |
The contraction theory. Sheet-folding (over-folding) in the Alps. The compression cannot be explained by cooling. The shrinkage of a great circle cannot take place at a single place. The continental blocks cannot be explained by the contraction theory. The necessity of replacing the contraction theory by that of displacement. The doctrine of land-bridges. The doctrine of the permanence of oceans. The shallow water origin of the marine sediments on the continental blocks. The disposal of the mass of oceanic water in the reconstruction of the submerged bridging-continents. Isostasy. Its demonstration by gravity measurements. Summary.
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