4l)(! Jiiu'ih'inann — Syminctnc Ai'vaiKjemeni in the 



line of a geosvncline preparatory to more extensive foldin,^. 

 The sontliern portion* of the uplift which, according to its 

 normal position to the basin and the Precambrian arms, should 



Fig. 3. 



Fig. 2. Diagram to show events on southern slope of 'North America 

 still without interference of Atlantic pressure. Lettering as on figure 1. 

 Arrows indicate main outlets of basin B. 



extend due south, has been affected by the Appalachian fold- 

 ing and twisted into a southwest direction. As a result of the 



