BTATM OTOLOGIST. Tl 



Hamilton Group seems to play a v< rj important part is 

 the northern portion of the peninsula, bat in the 

 southern part of the State it has nal yet I bisfactorily 



identified Prom Thnnder Bay it passes under the bed of Lake 

 Huron, and reappears apon the Canada shore, between Ben- 

 ■ k and Cape [pperwaah or Settle Point. Prom here, 

 ally as can be ascertained from the leporta of the 

 adian survey, it passes - athward in a belt about ten miles 

 rn part of the county of Lambton, where 

 it is met by another outcropping belt, extending east from the 

 shores of Lake St Clair. The united belts fill a trough in the 

 irberg lit which extends east to the shore of Lake 



Erie between Point aux Pirsand Long Point, whence it crosses 

 ike, and reappears in Ohio. 

 The branch which comes in from the direction of Lake St. 

 Clair, ought to be recognized in the southern part of our penin- 

 sula, but though we have hero a great thickness of argillaceous 

 strata, thej are supposed to belong rather to the group above 

 than to this one. It seems, at any late, pretty obvious that the 

 eminently foesiliferous Km (' Thunder and Little Tra- 



8. do ]\><\ reach rje latitude of Detroit, a fact which 

 - writh the attenuation of the Helderberg lime- 



;ccti*n. 

 In SI teal point '■!' view, the rocks of this group have 



rn to post kt interest. It would certainly 



be well, however, I the hydraulic properties of some of 



the argillaceous lii of Thunder Bay. 



lo. Huron Group, 



\- s;ilphur Island, in Thunder Bay, not more than a mile 

 • from Partridge Pt., is found a black bitumi 

 which is believed to overlie the f as clifis at the 



\ nndistui iland, 



which few feet above 



shales burn with considerable free- 

 dom, and it is stated that a combustion Btarted fr< m c 



continued s\ many 



