18 Instructions to Field Parties. 



Hagerstoivn series. — Yellow to red sand and loam, with clay sub- 

 soil of same color, derived from massive limestone, in residual 

 valleys and uplands. 



Fort Faijne series. — Light-colored, usually yellow, sand and loam, 

 resting on clay of same color; both soil and subsoil usually very 

 cherty. Derived principally from Knox dolomite (magnesium 

 limestone). 



ClarksviUe series. — Soil of varying colors, with a distinctive red 

 or yellow subsoil derived mainly from the limestone of the St. 

 Louis group. 



Miami series. — Light-colored sand and loam, resting on light- 

 colored glacial till or loess of the glaciated and loessial areas. 



Marsliall series. — Dark-colored sand and loam, resting generally 

 on light-colored glacial till or loess of the glaciated or loessial 

 areas. Generally upland areas. 



Sioux series. — Dark-colored material resting on dark or light col- 

 ored subsoils, with gravel beds within 3 feet of the surface. 

 Occupying river bottoms in the glaciated area. 



Dunkirk series. — Dark-colored material found on the glacial 

 beaches around the Great Lakes. 



Oswego seizes. — Residual prairie soils derived from interbedded 

 sandstone, limestone, and shale. 



Sedgwick series. — Origin not clearly understood; the soils may 

 possibly not be related. 



Maricojxi series. — Colluvial wash from granitic hills. Inter- 

 mountain and Pacific Coast States. 



Fresno series. — Alluvial wash of granitic material. Inter-moun- 

 tain and Pacific coast. 



Yakima series. — Derived from basaltic material and volcanic ash. 

 Pacific coast. 



Reiljiehl series. — Residual or alluvial, from red sandstone strata 

 of the far West. 



O.rnard series. — River, delta, and coast valley soils of sandstone 

 and shale material. Pacific coast. 



Billings series. — Interior valley soils derived from sandstone and 

 shale of the Great Plains. 



Salt Lake series. — Lacustrine deposits, typically developed around 

 the Great Salt Lake. 



Pecos series. — Alluvial, highlv calcareous soils of the far West. 



