CLASSIFICATION OP SOILS 73 



thfl miming water and form tin- . l| of the rift* 



bottom. Many of the finest particles are washed into 

 the river or creek, shown at .v. and are carried off to be 



ted probably hundreds of miles away. \\ h« 



ies and lloods the bottom lands, quantities of 

 mud and iand are deposited on the flooded area. The 

 mud and iand have come from hillsides, possibly many 

 mile.- away, and in time t hey become part of the soil of 

 the river bottom. Soils that have been moved from the 

 place of formation are Called TRANSPORTED SOILS, and 

 are often a mixture of soils from many locslil 



Wind storms slso move soils ahont to a limited extent 

 You have all noticed the great clouds of dust Mown 

 about by high winds; and in very dry countries, BUCh as 

 the northern portion- of Africa, the amount <>: 



mored is considerable In onr country, with the excep- 

 tion of one or two Westen] States, the amount oi 



• 1 by winds i- <>f small consequence. 

 In some parts of the world much soil has been n 

 and is even now being moved, by glaciers, which are 

 nothing more than rivers of ice. Hut glacial action i- at 



ftt limited to a \.rv -mall part of the inhabited 

 world, and need not concern us. 



74. Soils in Place. — Boils that remain where they are 

 formed are called soils i\ PLACE. The soils thai 



lopes of hills and mountains for the most part 

 belong to this class. Soils in place are seldom mixed 

 with the soils of other localities, but re-ult simply from 

 the decay of the rucks about them. 



75. Soils Classified According; to Composition. — B 

 whether transported or .-oils in plate. \ary in the way 



