CONTENTS 
Vll 
FIGURES 
1. Location of Honneybrook Anorthosite. 
2. Section at Barneston, Pennsylvania. 
3. Section at Birdell, Pennsylvania. 
4. Normal Continental Plait. 
5. Development of Cordilleran Anticlinorium. 
6. Evolution of the Overturn Plication. 
7. Beginning of the Basinal Infold. 
8. Origin of the Monoclinal Flexures. 
9. Pre-Cretacic Dike and Ore-bodies on Chupadera Mesa. 
10. Structure of Antimony Ore-bodies in Washington. 
11. Later Diastrophism of the Rocky Mountain Cordillera. 
12. Girdling of the Sierra de los Caballos. 
13. Map of Glaciation in Eastern Kansas. 
14. Microscopic View of Volcanic Ash. 
15. Map of Permian Glacial Deposits of Argentina. 
