. Bulletin of the Geological Society of America. Geology. 94 B. K. EMERSON—TETRAHEDRAL EARTH : INTERCONTINENTAL SEAS Indeed, I have tried to explain the great equatorial notch in the At- lantic coastline of the Americas and the similar one in the Pacific coast- Line of the Asia-Australia mass, which prevents them taking the con- densed tetrahedral shape of Eur-Africa, and the great elongation of the continents meridionallv as a distant echo of this force. The series of oblique and curved feature lines in Mars and less dis- tinctly in Jupiter and Venus, with the probability that these planets m
. Bulletin of the Geological Society of America. Geology. 94 B. K. EMERSON—TETRAHEDRAL EARTH : INTERCONTINENTAL SEAS Indeed, I have tried to explain the great equatorial notch in the At- lantic coastline of the Americas and the similar one in the Pacific coast- Line of the Asia-Australia mass, which prevents them taking the con- densed tetrahedral shape of Eur-Africa, and the great elongation of the continents meridionallv as a distant echo of this force. The series of oblique and curved feature lines in Mars and less dis- tinctly in Jupiter and Venus, with the probability that these planets may still be plastic at or near the surface, renders it possible that the similar lines on the earth may have had a similar origin. It must be borne in mind, however, that the mountain chains and great depressions which are among the important features here considered are of much later date, a few Paleozoic, the most and most important Tertiary. .V. Figure 7.—Prinz's Map of main Structure Lines on the Earth. Showing the indications of torsion. I should search for remains of direct tidal wrinkles or fluidal struc- tures in pre-Cambrian rocks, and the structures in all these areas should be studied for this purpose. It is quite generally true that the prevail- ing strikes in Archean beds are to the northeast north of the equator and southeast south of the equator. Von Richthofen cites the prevailing northwest strike in Shantung in China and northeastwardly into Corea as an exception to the rule, but there is even here a second pre-Cambrian folding present with northeast-southwest strikes.* The purpose of this section is to show that the cause adduced by Dar- win, conjoined with the cause which has produced the Mediterranean's, may explain the constriction of the continents, especially Asia-Australia * Von Richthofen : China, vol. ii, pp. 220. 233-23G,'244 (1882).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for rea
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