DEPOSITION OF PORT NELSON AND SEVERN RIVER LIMESTONE 369 



JOHNSTON Series of Desk maps 



CO^YRtCHT 1914. A. J. NYSTROM << CO.. CHICAGO. 



Figure 2. — Generalized Map of North America during Period of Deposition of the Port 

 Nelson and Severn River Limestone 



Late Edgewood and earlj' Cataract or Brassfield time. Lined areas represent seas. 



