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. 



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

 lowing strata wei-e penetrated by the drill : — 



Corniferons. 



f 



1 to 

 12 to 

 25 to 



12 feet.. Drift. 



2.5 " . . Coi'niferons limestone. 



32 " . . Onondaga limestone. 



Lower J 

 Helderberg. | 



32 to 35 



Salina . 



Clinton . 



Medina 



35 to 



52 to 



60 to 



90 to 



100 to 



107 to 



147 to 



152 to 



1 80 to 



186 to 



190 to 



302 to 

 500 to 



52 

 60 

 90 

 100 

 107 

 147 

 152 

 180 

 186 

 190 

 302 



500 

 700 



j 700 to 720 " 



I 720 to 730 " 



f 730 to 750 " 



I 



J 750 to 780 " 



1 780 to 833 " 



I 833 to 1500 " 



Fair cement rock. 



Shale and cement rock. 



Dark shale. 



Shale and cement rock. 



Gypsum and shale. 



Shale. 



Gypsum and Shale. 



Shale. 



Sliuly limestone. 



Drab colored limestone. 



Shaly limestone. 



Gypsum and shaly limestone, with 



transparent particles of se- 



lenite / 

 Magnesian limestone. 

 Shaly limestone. 



Clinton limestone. 

 Clinton shale. 



Red shale, soft at first but gradual- 

 ly becoming harder. 



Red sandstone, mottled. 



Sandstone, i-ed and white. 



Soft red shale, with bands of gi'ey 

 and green. 



