

V r A' /> ' - -L / Y 



, 



Y A^^f'^^/S ... Z 



A^V^/T ^-^^ s^" X^ 



-~^jr^^^}?=/ ^ /^ 



LANDS, GEOSYNCLINES, 



AND EPEIRIC 

 SEAS OF N. AMERICA. 



CHARLES SCHUCHERT 



SCALE Of 6TTUTg MILES 



100' o ' 200 ' 400 ' 



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. 



