338 



PROCEEDINGS OF THE CANADIAN INSTITUTE. 



THE GEOLOGICAL FORMATION AT PORl' COLBORNE, 

 AS SHOWN BY DRILLING FOR NATURAL GAS. 



By John C. McRae, Port Colborne. 



Commencing at a spot twelve feet above Lake Erie level, the fol- 

 lowing strata were penetrated by the drill : — 



Corniferous. 



Lower 

 Helderber 



.{ 



Salina , 



Clinton 



35 to 

 52 to 

 60 to 

 90 to 



100 to 

 107 to 

 147 to 

 152 to 

 180 to 

 186 to 

 190 to 



Medina . . , . - 



12 feet. 



1 to 

 12 to 25 

 25 to 32 



32 to 35 " 



52 

 60 

 90 

 100 

 107 

 147 

 152 

 180 

 186 

 190 

 302 



302 to 500 



500 to 700 



/ 700 to 720 



) 720 to 730 



r 730 to 750 



750 to 780 

 780 to 833 

 833 to 1500 



Drift. 



Corniferous limestone. 



Onondaga limestone. 



Fair cement rock. 



Shale and cement rock. 



Dark shale. 



Shale and cement rock. 



Gypsum and shale. 



Shale. 



Gypsum and Shale. 



Shale. 



Shaly limestone. 



Drab coloi'ed limestone. 



Shaly limestone. 



Gypsum and shaly limestone, with 



transparent particles of se- 



lenite ? 

 Magnesiau limestone. 

 Shaly limestone. 



Clinton limestone. 

 Clinton shale. 



Red shale, soft at first but gradual- 

 ly becoming harder. 



Red sandstone, mottled. 



Sandstone, red and white. 



Soft red shale, with bands of gi*ey 

 and green. 



