Scale of Miles 



ORDOVICIANandCAMBRO-ORDOVICIAN 



Present outcrops Former extent 



Extension under vjoun^er rocKs [///J 



Fig'ure 32 Ordovician and Cambro-Ordovician outcrops. The probable 

 former extent of the seas of this period and the extension of the forma- 

 tions under those of younger age are shown. The Cambro-Ordovician 

 outcrops include the Wappinger terrane. 



