LANDS, GEOSYNCLINES, 



AND EPEIRIC 

 SEAS OF N. AMERICA. 



CHARLES SCHUCHERT 



6CALE OF STATUTE MILES 



FIG. 9. Generalized map of North America in Paleozoic time, showing in white 

 the lands or positive elements, in darkest shading the three geosynclines or sub- 

 positive elements, and in lightest shading the extensive neutral medial area of the 

 continent. The two heavy black lines indicate the Cincinnati and Ozark (Kan- 

 kakee) uplifts. From the Pirsson-Schuchert Text-book of geology, published 

 by John Wiley & Sons, Inc. 



