Foraminiferal Biostratigraphy of the Caversham Formation and Its Implication for Stratigraphy and Sedimentation Study, Northeast Otago, New Zealand

Budianto Toha (Department of Geology, Gadjah Mada University)

Berita Sedimentologi
Vol 16, No 1 (2001)

Foraminifera play an important role in stratigraphy and sedimentation analysis of the Caversham Formation. Foraminiferal biostratigraphy has allowed definition of the stratigraphic relationship between three sections studied, i.e. Puketeraki, Karitane Peninsula, and Matanaka Farm respectively. Additionally, foraminiferal assemblages satisfactorily determined New Zealand Stages and Substages of the Otaian and Altonian Stages of the lower Miocene (Burdigalian) age, as well as the depositional environment. Paleoecology of some particular foraminifera (e.g. Globoquadrina dehiscens and Ehrenbergina marwicki) has been utilized successfully to examine the depositional process.