U. S. GEOLOGICAL SURVEY 



PROFESSIONAL PAPER NO. 20 PL. XII 





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A. BASE-LEVEL FEATURE IN NANUSHUK SERIES ON ANAKTUVUK RIVER. 

 Looking N. 30° E. 



P.. STRUCTURE AND RAPID ALTERNATION IN BEDDING IN NANUSHUK SERIES ON ANAKTUVUK RIVER. 



Looking N. 70° E. 



