456 



NEW YORK STATE MUSEUM 



Bastard rock (Pulaski shale) 549 ft 



Black slate (Utica) 180 



Trenton limestone, struck at 1609 



Potsdam sandstone, struck at 2259 



Granite, struck at 2415 



The thickness of the Trenton limestone is given in the record as 

 747 feet. There is a lack of correspondence in the several records 

 extant, but there is probably no error in the depth given for the 

 granite, 2415 feet. The identification of the top of the Trenton 

 limestone may have wavered. It is taken here as 1609 feet. 



What was found in the well in the way of geologic interest 

 has already been noticed. The Potsdam sandstone made a great 

 impression on the drillers w r ho were acquainted with the Penn- 

 sylvania field. It was a genuine surprise to them to find such a 

 clear and sharp sandstone here, but it would not have been had 

 they been conversant with the scale of New York. They honored 

 the new-found sandstone with many indications of their interest. 

 It was called by them " Virginia sand ", " McDonald sand ", etc. 



Potsdam sandstone in this occurrence and in the Parish well 

 and at Greig, Lewis co. has caused considerable trouble and ex- 

 pense in the questions it has raised to the people of this region. 



h Oswego. Drilling has also been done for the city of Oswego, 

 in its immediate neighborhood, but nothing was found to give 

 encouragement to the prospectors. A well drilled in the valley 



reports: 



Sandstone (Medina and Oswego) 600 ft 



Shales (Pulaski and Utica) c97 



Trenton limestone, at 1197 



This well was entirely unproductive. 



Section 2 

 Jefferson county 



A few w T ells have been drilled in Jefferson county in the search 

 for gas that is here being placed on record, and it seems proper 

 to make a brief note of the fact, though no economic gains can 

 be traced to the explorations here. 



a Adams. One of the most thorough of these attempts was 

 made at Adams, principally under the control and at the expense 



