12 



able over at least several square miles about Massillon. It 

 is locally known as the Bridgeport Coal, and the term may 

 be adopted for general use. 



ON THE SALINA GROUP IN NORTHEASTERN 



OHIO. 



BY E. W. CLAYPOLE. 



No distinct recognition of this group is made in the 

 Geology of Ohio, but the salt beds found in the north of the 

 State have been therein referred to the Lower Helderberg, 

 because gypsum and salt are apparently found in *;he lower 

 part of that group in some other places. But this position 

 is scarcely tenable in view of the recent revelations of the 

 auger in the region. It might previously have been at least 

 plausible if not defensible. 



Some years ago at Newburgh, near Cleveland, a bore 

 hole was sunk 3,200 feet which passed through the Cornifer- 

 ous Limestone under which was found f550 to (300 feet of 

 limestone, evidently the Lower Helderberg. The bit then 

 met 550 feet of Magnesian Limestone alternating with gyp- 

 sum and salt. 



At Wadsworth a similar record was given and during 

 the past year two other wells have been sunk in search of 

 oil or gas at Akron, both of which exactly reproduced the 

 previous record and penetrated a lower Magnesian Limestone 

 to the depth of about one hundred feet. This must be as- 

 signed to the Niagara, and yielded a small quantity of dark 

 heavy oil. There is no method of interpreting these records 

 except by admitting the Salina as an important element 

 in the column. 



The Lower Helderberg has shown its full thickness of 

 between 500 to 600 feet. The 500 feet of salt-bearing rock 

 below it cannot logically be added to it. Moreover the Salina 

 has a thickness of one thousand feet in northeastern and 

 middle Pennsylvania, so that as we pass eastward towards 



