MARYLAND GEOLOGICAL SURVEY 215 



Some good outcrops of kaolin are found in the cut of the Philadel- 

 phia, Wilmington and Baltimore Railroad on the property of George 

 W. Sutton at Perry ville. This cut is the first large one on the road 

 southwest of Jackson and at a point about one mile southwest of that 

 station. There is, at this point, at least ten feet of the material 

 exposed, but it has never been exploited to any great extent although 

 a small quantity was shipped some time ago for trial. 



The material is covered by six to eight feet of "Wicomico formation, 

 but Mr. Sutton claims that in his field on the west side of the track 

 the material was struck at a depth of only ixve feet. 



Samples for testing were taken from the west side of the cut at 

 three different points, representing a distance of at least 200 feet. 



The kaolin as mined is light-bluish gray in color and has some 

 limonite stains close to the surface. There is much quartz in the 

 material and about 25^ was caught on a 100-mesh sieve in the wash- 

 ing of the clay. 



Both the crude and washed kaolin are very refractory, barely show- 

 ing signs of incipient fusion at cone 27. 



In burning, owing to its silicious character, the kaolin shows very 

 little shrinkage. The sample tested burned white at cone 8. 



Kaolin is found on the property of Mr. Hooper, a little over \ mile 

 west of Leslie, and about \ of a mile south of the Baltimore and Ohio 

 Railroad tracks, and near a branch of the high road. 



This is a material derived from the decomposition of granite and 

 contains a considerable percentage of coarse quartz grains. It is 

 overlain by 8 feet of sanely material. In washing it 38^ of the 

 material was retained on the 100-mesh sieve and 5^ on the 150-mesh 

 sieve. The material falls to pieces readily in water and could there- 

 fore be washed without much trouble. The washed sample burns to 

 a white color at cone 8, and has a shrinkage at this point of but 4$, 

 the air-shrinkage being 2$. When heated to cone 27 in the Deville 

 furnace, it shows simply the beginning of incipient fusion, while the 

 color is quite white. The tensile strength was extremely low as is 

 the case in all kaolins and did not exceed ten pounds per square inch. 

 This property being located so near to the railroad, should be capable 

 of easy and rapid development. 



