1919] Pendleton: A Study of Soil Types 491 



Soil: 0-36 inches — A medium textured brown friable clay loam. The soil column 

 throughout was more or less filled with small soft whitish fragments, por- 

 tions of the parent rock. 

 36 inches — The weathered parent rock was encountered. 

 History : A. T. Currier, owner. The field is in pasture, and has not been culti- 

 vated for forty years, to the knoAvledge of the ranch foreman. The soil is 

 probably virgin. Sample collected August 20, 1915. 

 Depths of horizons: 



3-A 0-12 inches. 3-B 12-21 inches. 3-C 24-36 inches. 



No. 4 — Altamont Clay Loam 



Location: On a hillside a few feet above the Cahuenga Pass (Burbank road), 

 near Oak Crest, Los Angeles County. Just a few feet from the U. S. 

 Bureau of Soils station for the type in the San Fernando area. (For map, 

 see the map under sample no. 25.) 



Soil: 0-14 inches — A dark brown clay loam. 



14-36 inches — A yellowish brown loam, grading into the weathered, thin bed- 

 ded shales at about 36 inches. 



History : Boadside, above the big cut on the road, probably never tilled. The sur- 

 face is not so steep but that it could be well tilled; some of the soil in 

 the immediate vicinity is cultivated to grain. Sample collected August 21, 

 1915. 



Depths of horizons: 



4-A 0-12 inches. 4-B 12-24 inches. 4-C 24-36 inches. 



No. 5 — Diablo Clay Adobe 



Location: About % a mile north of Calabasas, San Fernando Valley, Los Angeles 

 County. The station is some distance up the hill to the west of the road 

 running north from the Calabasas store. The sample was collected near 

 the top of the hill, to the northeast of the oak tree. 



Soil: A dark gray to black typical clay adobe. Distinctly heavy. Digging was 

 very difficult, the soil coming up in large, very hard clods. The soil was of 

 about the same color and texture down to the bedrock at 26 inches. The 

 bedrock is a heavy claystone or shale. 



History: John Grant, Calabasas P. O., owner. The land has been dry farmed 

 to grain. Presumably there had been no additions of fertilizing materials 

 to the soil. Sample collected August 21, 1915. 



Depths of horizons: 



5-A 0-14 inches. 5-B 14-26 inches. 26 inches. Parent rock. 



No. 6 — Diablo Clay Adobe 



Location: In Contra Costa County, % mile west of Tassajero; 6 miles east 

 and a little south of Danville. Station about 150 feet up the hill to the 

 south of the road, that is, about one-third of the way up the hill. 



Soil: 0-34 inches — A black or dark gray clay adobe, moist at 10 inches. 



34-72 inches — A dark grayish brown subsoil, becoming lighter below the third 

 foot. No bedrock within the 6 foot section, nor was there any sign of any 

 outcrop in the vicinity. The slope of the hill moderate, the exposure 

 north. The sample was collected with the assistance of Mr. L. C. Holmes 

 and Mr. E. C. Eckman, both of the U. S. Bureau of Soils. They pro- 

 nounced the station typical. 



