MARYLAND GEOLOGICAL SURVEY 



163 



covering-, consisting of other soils, and the heavy gravel bands which 

 underlie several of the upland soil types are thus exposed. 



The natural timber gro'v^'th of these gravelly areas consists of chest- 

 nut, pine, and oak, while the cultivated crops are usually the same as 

 those found on better soils. Where a single narrow gravel band 

 crosses a cultivated field no difference is made in the adaptation of 



Mechanical Analyses of Windsor Sanu. 

 [Fine earth.] 



crop to this exceptionally gravelly condition, although the yield of the 

 crop is invariably much less than upon the other soil. Where the 

 larger areas are found, the Susquehanna gravel if cleared should be 

 reforested, not only because of its small value as farm land, but also 

 to prevent further washing and destruction of adjoining areas of more 

 valuable soil. 



The Susquehanna gravel consists of 30 to 60 per cent, of coarse 

 gravel mixed with sand and loam. It is underlain by various sub- 

 soils, usually loamy or sandy. In addition to presenting great diffi- 

 culties in the way of cultivation, it is unsuited both by texture and 

 attitude to the production of ordinary farm crops. Similar soils in 



