Dec, 1919] 



Caves at Put-iii-Bav, Ohio 



41 



and detritus obstruct further exploration. It is probable that a 

 low chamber lies below and beyond. 



The numerous ledges and low bluffs of dolomite scattered 

 about the interior of the island may be the surface expression of 

 similar features. However, much of the island is hummocky, 

 due to masses of outcropping rock. Whether these knolls 

 and ledges are results of erosion or of such internal distrubances 

 as faulting is problematical, and would only be revealed by 



4. Characteristic shore features, 

 Doming and subsequent solution. 



careful search. One fact arguing against solution caves is 

 the absence of sink-holes. They are extremely rare in any 

 case; where they do occur they are over known caves, and are 

 due to the partial collapse of domed strata rather than collapse 

 following solution. 



Solution does occur to a limited extent. It was not found in 

 the interior, but may be seen readily at the base of the .shore 

 cliffs, where caverns are formed at lake level. However, there 

 has also been marked disturbance of the strata, as shown in 



