| From observations made on four piston cores located in the eastern equatorial Pacific, Globoquadrina pseudofoliata, a local marker, became extinct around 300.000 years B.P.; Globigerina calida calida appeared at about 180,000 years B.P.; East of the 1 10th meridian, a pronounced peak in the frequency of Globorotalia inflata occurred at 40.000 years B.P. There is a large overlap of Globoquadrina conglomerata and Gq. pseudofoliata.Globorotalia crassaformis hessi, a tropical Atlantic marker, did occur in the Pacific. The stratigraphic range of four other species is also discussed. [NOT CONTROLLED OCR] |
