'^Clinton'' sand field in ohio 673 



Interesting to report, the sand does not exist west of the longitude of 

 Columbus, and there its place is taken by shales. In thickness the sand 

 generally varies from a few feet to 100, but the usual range is from 10 to 

 40. The wells ordinarily vary in depth from 2,300 to 3,500 feet. 



Record of a ''Clinton" Well near Bremen, Fairfield County, Ohio 



Thickness To bottom 



Feet Feet 



Mantle rock 49 49 



Cuyahoga and Sunbury sandstone and shales 626 675 



Berea sandstone 35 710 



Bedford and Ohio shales 975 1,685 



Devonian limestone 50 1,735 



TMonroe limestone 275 2,010 



Silurian ) Niagara limestone 360 2,370 



I Clinton limestone 95 2,465 



Shales 120 2,585 



"Clinton" sand 34 2,619 



Bottom of well 2,620 



The oil, which has a density varying from 35 to 46° Baume, differs in 

 no important way from the light oils of Pennsylvania and West Virginia. 

 Its occurrence is unique in Ohio, in that it appears to be free from water. 

 From this fact the conclusion is reached that the oil lies in shallow basins 

 rather than on the slopes of anticlines. The production of the "Clinton" 

 sand at its maximum was about 1,300,000 barrels per year. Efforts have 

 been made within the past few years to extend the "Clinton" sand field, 

 but without notable success. The great depth of the sand and its treach- 

 erous nature make the search a very costly one. 



"COENIFEROUS^^ EOCKS AS A SoURCE OF PETROLEUM IN INDIANA 



Eocks of Corniferous age are not a source of oil in Ohio and not a 

 large source in Indiana, but the Phoenix well, which was drilled in Terre 

 Haute in 1889, is the best producer ever drilled in that State.'^ The 

 "Corniferous" limestone^^ was struck at a depth approximating 1,660 

 feet, and for at least twelve years the production averaged 1,000 barrels 

 of oil per month. In 1908 it yielded 15 barrels per day. Few wells in 

 this country have so large a daily yield after twenty-seven years' con- 

 tinuous production. Other wells were, of course, sunk in this locality, 

 but they were all failures. Later a few small producers were secured in 



» W. S. Blatchley : Dept. of Geol. and Nat. Res. of Indiana, 25th Ann. Kept,, p. 517. 

 1" Some geologists call this oil rock sandstone. 



