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New Zealand Stratigraphic Lexicon

This is a compilation of New Zealand rock unit names, giving information on age and distribution, and references to relevant literature. Prospective authors are encouraged to check proposed new names against the New Zealand Stratigraphic Lexicon by using the web access described below. Authors are also urged to follow the International Stratigraphic Code (Hedberg 1976), which has been adopted for New Zealand use by the Geological Society of New Zealand. Published lexicons of stratigraphic names used in New Zealand have been compiled by Adkin (1954), Fleming (1959) and McGregor (1987). The LEXI computer database is based on the last, but is regularly updated.

The STRATLEX database is maintained by the Institute of Geological & Nuclear Sciences, and is available free of charge to the geological community through the Internet at


Adkin, G.L. 1954: Bibliographic index of New Zealand stratigraphic names to 31 December, 1950. New Zealand Geological Survey Memoir 9.

Fleming, C.A. (ed.) 1959: Lexique stratigraphique international. Vol. VI, Oceanie, Fascicule 4, New Zealand. Paris, CNRS.

Hedberg, H.D. (ed.) 1976: International stratigraphic guide. A guide to stratigraphic classification, terminology and procedure. (International Subcommittee on Stratigraphic Classification of IUGS Commission on Stratigraphy). New York, John Wiley & Sons.

Hornibrook, B., et al. 1965: Report of the subcommittee to investigate the desirability of a New Zealand stratigraphic code. Geological Society of New Zealand newsletter 18: 1-27.

McGregor, E. 1987: Bibliographic index of New Zealand stratigraphic names to 31 December 1986. New Zealand Geological Survey bulletin 102.

Raine, J.I.; Keyes, I.W. 1996: New Zealand Stratigraphic Lexicon Online. Geological Society of New Zealand newsletter 10: 30-32.

Compiled by Ian Raine

In 2000, GSNZ surveyed its members about the future of the NZ Stratigraphic Lexicon: read results.