EULL. GEOL. SOC. AM. 



VOL. 27, 1915, PL. 20 



Figure 1. — Sun-cracked, limy Lower Salina Shale, near Graham, 



SOUTHWEST OF OTISVILLE, NEW YORK 



Figure 2. — Great Ballast Quarry in the Shawangunk, near Otisville. New York 



The large vertical slab is replete on the under side with Arthrophycus alleglianiense 



SALINA AND SHAWANGUNK AT OTISVILLE, NEW YOEK 



