U. S- GEOLOGICAL SURVEY 



MONOGRAPH XIX PL-II 



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GENERAL GEOLOGICAL MAP OF THE PENOKEE DISTRICT 



BY R D IRVING AND C R VAN HISE 

 Scale op Map I in - 3 milks. 



Cam BRIAN 



ALGONK IAN 



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Eastern Sandstone Keweenawan 



Penokee Series 



ARCH E AN 



Southern Complkx 



UPPER SLATE MEMBER IRON-BEARING MEMBER QUARTZ- SLATE MEMBER CHERTV LIMESTONE MIMBER GREENftTONI CONOLOMERATIS CIRRUOINOUS SLATIS ERURTIVIS' 'tRANITIA ORANITOID ONCISt. fCNIITAEIIIE ORAlNIOONEISs' 



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