Vol. 245, Issue 8, 1947

Science Paper
Geosynclines, a Fundamental Concept in Geology
Martin F. GlaessnerCurt Teichert
The original definition and subsequent development of the concept are re-examined critically, and the nomenclature of the various types of geosynclines is reviewed. A formal comprehensive definition is referred to...
Science Paper
The Dunite-Mylonites of Saint Paul’s Rocks (Atlantic)
C. E. Tilley
The islets of St. Paul9s Rocks lying on the submarine Mid-Atlantic ridge are unique among oceanic islands in their petrographical character. They are built of intensely mylonitized dunites. A systematic...
Science Paper
Variation in the Molars of the Living Elephant and Critical Revision of the Fossil Proboscidae of Southern Africa; Part II
H. B. S. Cooke
...
Science Paper
A Model to Aid in the Explanation of Interference Figures
Max Emery Willard
...
Science Paper
Note on the Measurement of Variability and on Relative Variability of Teeth of Fossil Mammals
George Gaylord Simpson
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