U. S. GEOLOGICAL SURVE' 
BULLETIN NO. 313 PL. V 
CRABTREE & HAVEY QUARRY IN SULLIVAN. 
.1. South side, showing irregularity in thickness of sheets owing to their lenticular form; also 9 black 
knots. The cuts are along gram and hard way. B. East walL showing lenticular form of sheets in 
cross section on a joint face. 
