124 THE ECONOMIC EESOUECES OF ST. MARY's COUNTY 



has almost invariablj' been obtained. On the Patuxent Eiver side of 

 the county good flows of water are obtained from a 235-foot well near 

 Sotterly wharf, from two wells 290 feet in depth at Millstone, and from 

 two wells 25T and 287 feet deep east of Pearson post office. In some 

 cases the wells have been sunk beneath the water-bearing horizon, thus 

 making the horizon, from the depths of the wells, appear to be very 

 uneven. In reality it seems to dip at a quite uniform rate to the south- 

 east, and consequently the wells in the lower portion of the county are 

 deeper than those higher up the rivers. 



Along the Potomac Eiver the Calvert horizon furnishes the water for 

 the 190- and 205-foot wells at Leonardtown, a 270-foot well at Piney 

 Point, numerous wells about 270 feet in depth on St. George's Island, 

 several wells near St. Inigoes from 300 to 365 feet deep, a well on the 

 west bank of Smith Creek 365 feet in depth, and two wells near Corn- 

 field Harbor 360 and 370 feet deep. 



One other water-bearing horizon has been found at Cornfield Harbor 

 at the depth of 240 feet. This is probably within the Choptank forma- 

 tion. It is probably less extensive than the basal Calvert horizon, since 

 it has not been noticed elsewhere. 



The two principal water horizons described above have been penetrated 

 by wells on the opposite side of the Patuxent Eiver in Calvert County, 

 and on the south side of the Potomac Eiver in Virginia. 



