Quaternary foraminiferal bio‐ and isotope stratigraphy of ODP Holes 122–760A and 122–762B, Exmouth and Wombat Plateaus, northwest Australia∗

Tables 2 and 3 are Supplementary Papers lodged with the National Library of Australia (Manuscript Section); copies may be obtained from the Business Manager, Geological Society of Australia.

The bio‐ and isotope biostratigraphy of the uppermost (Quaternary) section at ODP Sites 122–760A and 122–762B are presented. Biozonations of Bolli and Premoli Silva (1973) and Chaproniere (1985, 1991) are recognized, as well as a distinctive acme in pink‐pigmented forms of Globigerinoides ruber in the Late Pleistocene (isotope stages 5e to ∼ 10). These, together with a series of sinistral‐coiling events in Pulleniatina spp. and Globorotalia truncatulinoides during the Middle and Early Pleistocene, serve as locally useful bioevents in this part of the eastern Indian Ocean. The biostratigraphy indicates the presence of minor and major hiatuses, the latter associated with physical anomalies near 7 m downcore in Hole 760A and between 4 and 4.5 m in Hole 762B.

Key words:

• biostratigraphy
• oxygen isotopes
• planktonic foraminifera
• Quaternary

Notes

Tables 2 and 3 are Supplementary Papers lodged with the National Library of Australia (Manuscript Section); copies may be obtained from the Business Manager, Geological Society of Australia.

Present address: Antarctic CRC, University of Tasmania, GPO Box 252C, Hobart, Tas. 7001, Australia.