The American Geologist, Vol. XXVIIl. 
Plate XXVIII. 
Fig. 4. Beehivc-sbaped mass, lu feet high, starting in the upper massive 
bench. C. of the Clinton upper limestone, and reaching up into the 
Rochester shale, B, about H feet. A, Lockport limestone. 
Fig. 5. Same mass as Fig. 4, seen from above. 
REEF IN NIAGARA GORGE. 
About one-fourth mile above whirlpool. 
