Vou. IIT] ANDERSON—FURTHER STRATIGRAPHIC STUDY 31 
makes it evident that in fauna the beds are alike, if not in part 
identical. 
The clays at the top of the Etchegoin series to the north of 
Coalinga constitute at least a third of their entire thickness, 
or about 1500 feet. They have a somewhat banded appear- 
ance, the different strata showing different zones of color. 
Thus far no fossils have been found in them north of the 
Warthan creek, though elsewhere they have yielded Scutella 
gibbsi and the teeth of sharks. 
The Tulare Formation.—In the former paper the Tulare 
formation was described as a series of fresh-water deposits 
outcropping on the borders of the Great valley and overlying 
all the earlier deposits occurring along the range. 
It is found in the vicinity of Coalinga, in the Kettleman 
hills, and southward along the western side of the valley as 
far as McKittrick, Buena Vista lake, and about the Tejon 
ranch. The fresh-water mollusks forming the fauna of these 
beds in the Kettleman hills and near McKittrick have been 
noted by W. L. Watts’ as identified by Dr. J. G. Cooper. 
Shells of the fresh-water mollusks, Anodonta and Goniobasis, 
have since been taken from a prospect well drilled one-half 
mile north of McKittrick. They occurred in a layer of hard 
sandstone at a depth of 1000 feet from the surface. After 
penetrating this layer a strong flow of gas threw sand and 
stones from the well with great violence and with them many 
shells and fragments of these species. 
The beds of the Tulare formation are described as having 
a thickness of 1000 feet and standing at an angle of 30° and 
more in conformity with the underlying marine Pliocene. In 
the former paper they were tentatively correlated with the 
Orindan and associated beds described by Dr. Lawson from 
the Berkeley hills. 
While a complete statement of its equivalents can not be 
given here, it is important to remark that the Tulare forma- 
tion should have its continuation not only throughout the 
Great valley, but that its counterparts should occur in all the 
1 Bull. Calif. State Min. Bur. no. 3, 1894, pp. 49 and 53. 
