134 THE ECONOMIC RESOURCES OP CALVERT COUNTY 



surface the borings have not extended to the Magothy horizon so that 

 it is not known at what depth it could be reached there. 



The Calvert Horizon. — The remaining artesian wells of the county 

 derive tjieir water supply from near the base of the Calvert formation. 

 It is not believed that they all draw their supplies of water from 

 exactly the same horizon but that they tap numerous water-bearing 

 strata located at various depths within the formation. It is also pos- 

 sible that the Governor Eun well penetrates the Eocene a short distance. 

 Because of the rapid thinning of the Miocene deposits northwestward 

 only the southern half of the county is underlain by the Calvert water 

 horizon. It furnishes the water in the wells at Eousby and Solomon's 

 Island, and probably that at Governor Eun. The well at Eousby is 240 

 feet deep and furnishes a large supply of fine water. There are four 

 wells on Solomon's Island ranging in depth from 258 to 258 feet. These 

 wells possess a good flow, which is somewhat greater at high tide than 

 at low. The water when first drawn tastes and has the odor of marsh 

 mud but this disappears upon exposure. 



Beside these wells in Calvert County there are others just across the 

 river in St. Mary's County which show the general artesian-water condi- 

 tions of the region. At Millstone, artesian water is reached at 290 

 feet; at Pearson mineral water is obtained at 257 feet; while at Sotterly 

 artesian water is obtained at 225 feet. 



