DEPOSITION OF EKWAN RIVER AND ATTAAVAPISKAT LIMESTONES 371 



JOHNSTON SCRIES OP DESK MAPS. COPYRIGHT 1914. A. .1. N^-iTOOU A CO.. CHICAGO. 



Figure 3. — Generalized Map of Islorth America during Period of Deposition of Ekwan 

 River and Attawapiskat Limestones 



Louisville or Lockport time. Lined areas represent seas. 



XXVI— Bull. Geol. Soc. Am., Vol. 30, 1918 



