rocks were left naked at the deluge, this is the only soil which 

 covers them at the present day ; excepting those places where 

 artificial works or post-diluvial waters have produced changes. 

 It may be referred to on the map, under these subdivisions. — 

 Granulated^ consisting of coarse grains of graywacke. It is 

 considerably fertile, and resists the effects of a drought. Ar- 

 gillaceous, or clay soil. Both subdivisions are more or less si- 

 licious. The Jlrgillaceous soil is extensive in slate colour , No. 

 II. III., and the lowest parts of IV. The Granulated soil in 

 the elevated parts of slate colour, No. III. and IV., and in all 

 the yellow colour where it is considerably silicious. But 

 whenever the hardpan crag prevails, the underlaying rock is 

 too well defended for disintegration, consequently there is no 

 analluvion. The argillaceous kind is intermixed with carbo- 

 nate of lime, so fine as to form a homogeneous mass in all the 

 him colour, where there is analluvion. The same reference 

 may be made to all the green colour / though considerable 

 magnesia is contained in the composition. The red colour is 

 almost wholly granulated analluvion ; but it is too silicious, in 

 most localities, excepting in low places, where other soil is 

 washed down and intermixed. 



Marine sand, crag and marly-clay. The marine 

 sand and crag are always underlayed by marly-clay ; there- 

 fore they may be referred together. But they are in patches 

 too limited for representing by any colours. Still, they are al- 

 most universal in all valleys, hollows and depressions of every 

 kind in every part of the earth. These depressions may be in 

 primitive rocks, thousands of feet high. And sometimes these 

 strata are of great extent on elevated plains. But they are 

 most conspicuous along the valleys of great rivers, as the Mis- 

 sissippi, the Hudson, &c. 



All other soils, such as diluvion, post-diluvion, &c., are 

 either too limited in their extent, or too variable in character, to 

 be profitably referred to a coloured map. 



