THE GEOLOGICAL FORMATION AT PORT COLBORNE. 341 



SECTION OF No. i WELL AT PT. COLBORNE. 



Corniferous 

 L. Helderbera: 



Drift 



- 180ft, 



Clinton 



c 



Medina 



— 452 ft. Salt water. 



4t)4ft. Gas, (sulphurous) 

 50Oft. 



' 764>£ft, Gas, in Medina Sandstone. 



When the salt watei' was 

 struck, the casing' had 

 to be put down, so as to 

 shut off the salt water. 



■1500fi;< 



