In this paper the author presents evidence to prove the value of the smaller foraminifera as a basis for correlating Eocene strata in California.

A study of foraminiferal sequences in a number of sections taken from widely separated areas shows that the general order of superposition of microfaunal assemblages remains constant, even in the presence of variable lithologic conditions.

Charts are presented indicating the position and correlation of foraminiferal zones and formations in various surface and subsurface sections of the Eocene in San Joaquin Valley. Comparison is also made with Eocene formations in other localities.

The vertical ranges of the faunal assemblages and of some characteristic species are shown in a graphic chart.

End_of_Article - Last_Page 1880------------