- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Upper Cretaceous strata along the west side of the Sacramento Valley and northern San Joaquin Valley contain a diversified and well-preserved fauna of planktonic foraminifera. Fifty-six of the stratigraphically important species of this fauna are herein described and illustrated. Three species are described as new.