Science. N. S. Vol. Ill, Plate 2. 



Illustkations to Article by G. K. Gilbert on Hypotheses. 



Fig. 1. — Eim of Coon Butte, with jmrt of inner face. Fig. 3. — Block of limestone on outer slope of Coon 



Butte, one-li,nlf mile from rim. 



Fig. 3. — Largest block of limestone on rim of Coon Fig. 4. — Outer slope of Coon Butte. 

 Butte. Diameter, 60 feet. 





Fig. ."i.— Interior of Coon Butte, as seen from the Fig. 6.— E.vterior of Coon Butte, as seen from the 

 talus on one side. The cliff below the rim is of surrounding plain, 



limestone. 



