Faunal evidence and potassium/argon dates suggest the approximate correlation of the Saucesian Stage of California with the Burdigalian Stage of Europe. The Orbulinid datum marks the approximate base of the Burdigalian Stage in deposits of deep-water origin within tropical and warm temperate areas. Orbulinids appear well above the base of the Burdigalian and Saucesian in temperate areas. Thus, it is suggested that it required from one to about two stages for orbulinids to adapt to the temperate zone after their initial appearance in the tropics.

End_of_Article - Last_Page 1079------------