BULL. GEOL. SOC. AM. 



VOL. 27, 1915, PL. 7 





t.< 



Si 



Figure 1. — The uneven upper Surface of the Anderdon Limestone in the Amherstburg Stone 



Company's Quarry 



Figure 2. — Rough upper Surface of the Anderdon Limestone, showing Joints widened by 

 Solution and later filled with Onondaga Mud 



THE ANDERDON SURFACE AT AMHERSTBURG, ONTARIO 



