II. DEMONSTRATION
CHAPTER III
Geophysical Arguments |
28 |
The two frequency maxima of the altitudes of the earth’s crust. Continental blocks and floors of the oceans as two different layers of the body of the earth. Principles of earth magnetism. Velocity of earthquake waves. Dredged samples. Sima and sial. Thickness of the continental blocks according to Hayford and Helmert. Specific gravity of sial and sima. Smoothness of the ocean floors. Absence of folded mountains on the floors of the oceans.
CHAPTER IV
Geological Arguments |
42 |
Width of the Atlantic Rift. The Zwarte Berge in Cape Colony and the Sierras of Buenos Aires. The eruptive rocks of Brazil and South Africa. Sediments of Brazil and South Africa. African origin of the Permo-Carboniferous erratics of South Brazil. The direction of folding of the gneiss massifs of South America and Africa. Regional movements of South America after the break. The Atlas Mountains without an American continuation. Character of the Atlantic Islands. The Carboniferous (Armorican) foldings in Europe and North America. Silurian-Devonian (Caledonian) folding. Algonkian foldings. Terminal moraines of the Pleistocene ice-caps. The convincing character of the independent controls. Basaltic zones of Greenland and Northern Europe. The Old Red in North America, Northern Europe, Greenland. Intrusive rocks in Greenland and North America. Lateral displacement of the masses of Grinnell Land and Greenland. Explanations with regard to the reconstruction of the pre-Atlantic connections of the continents. Abrolhos Bank. The Niger delta. The Newfoundland block. Iceland. The submarine bank in mid-Atlantic. Madagascar. India. The compression of Lemuria into the Himalayas. Australia. New Zealand. The collision of the Australia-New Guinea block with the Sunda Archipelago. Tasmania and East Antarctica. West Antarctica and the Drake Straits.
