BULL. GEOL. SOC. AM. 



VOL. 30, 1918, PL. 11 



Figure 1. — Basal Portion of the Severn River Limestone ; exposed along Severn River 



Figure 2. — Severn River Limestone; exposed along Smammattawa River about G Miles at.ove 



ITS Junction with the Winisk. 



EARLY SILURIAN LIMESTONES IN THE HUDSON BAY REGION 



