MARYLAND WEATHER SERVICE 151 



separate, so that a considerable variety of soils are found in the 

 district, including clays, loams, sands, of which the following de- 

 serve notice: 



Susquehanna clay. A stiff purplish colored impervious soil, fa- 

 miliar to those who have traveled by train between Washington and 

 Baltimore. 



Elkton clay. A yellow-gray variety, becoming friable when 

 drained. Foiind at the heads of emhayments in Harford County. 



Leonardtown loam. A silty yellow loam, clay-like when wet, 

 and forming hard lumps when dried. It occurs in extended areas 

 in St. Mary's County, where it is sometimes called "white oak soil." 



Norfolk loam. More sandy than the preceding, and more valuable 

 for agricultural purposes. Not so widely distributed as the pre- 

 ceding, but found in St. Mary's County and the "Forest of Prince 

 George" in south-east Prince George's County. 



Collington sandy loam. A residual soil derived from the weather- 

 ing of areensand ; has a loose loamy, coarse texture. One of the 

 richest soils of the region. A large area occurs in the "Forest of 

 Prince George." 



Sassafras loom. A mixture of sand and clay derived from older 

 strata and redeposited by stream action. In the southern part of the 

 area it occupies a level 60 to 90 feet above tide-water, but in Har- 

 ford and Baltimore counties, occupies the region which borders on 

 the Bay, and is often low and swampy. 



Norfolk sand. A reddish loamy material found in high and also 

 in low positions, owing to stream action. Widely distributed in Cal- 

 vert County. 



Windsor sand. Coarser than the last, with an even coarser sub- 

 soil. Found in northern St. Mary's and Calvert counties. 



Meadow. Under this name are included the areas along the bot- 

 toms of streams, also more particularly the low flat areas bordering 

 many of the larger bodies of water, and composed of fine silt and 

 clay deposited while the area was submerged. 



