2-i R. S. Bassler — Deep Well at Waverly, Ohio. 



by Dr. Oeorge P. Merrill, who determined them as peridotites 

 which had become altered into serpentine. That the presence 

 of this igneous rock is to be considered as indicating that the 

 well passed through the base of the Paleozoic cannot be posi- 

 tively determined from the facts at hand, as the material may 

 possibty have been derived as a bowlder from above. However 

 the facts so far as known are highly significant, and it may 

 be tentatively suggested that the Canadian rocks rest upon pre- 

 Cambrian. Whether this area was a part of an axis of uplift, 

 such as the Carter axis, or was included in a broad southern 

 extension of the Lauren tian shield during Cambrian and Ozark - 

 ian time, cannot be decided with the present evidence. 



U. S. National Museum, Washington, D. C. 





