- 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
One of the text figures in the original paper (ibid., v. 13, no. 4, p. 502-512, 1967; see Abstracts of North American Geology for February 1968) was incorrectly labeled. On p. 507 in figure 4b, left-hand column, second box from bottom, for Globorotalia fohsi barisanensis Zone, read Globorotalia fohsi fohsi Zone.