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dc.contributor.authorLowe, David J.
dc.date.accessioned2011-05-22T23:29:57Z
dc.date.available2011-05-22T23:29:57Z
dc.date.issued1986
dc.identifier.citationLowe, D.J. (1986). Revision of the age and stratigraphic relationships of Hinemaiaia Tephra and Whakatane Ash, North Island, New Zealand, using distal occurrences in organic deposits. New Zealand Journal of Geology and Geophysics, 29, 61-73.en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/5345
dc.description.abstractThe stratigraphic and chronologic relationships of Hinemaiaia Tephra and Whakatane Ash are examined using distal tephras preserved in organic-rich deposits at five sites in eastern and northern North Island, New Zealand. A c. 10mm thick, unnamed white rhyolitic ash layer described at two of the sites (Tiniroto and Poukawa), and previously of disputed stratigraphic signillcance, also occurs at the other three sites (Kaipo, Rotomanuka, and Okoroire) as a primary airfall tephra. The tephra is derived from the Taupo Volcanic Centre and is correlated with Hinemaiaia Tephra (definition of Froggatt) using similarity of stratigraphic position, composition (ferromagnesian mineralogy and glass chemistry), and radiocarbon age. It stratigraphically overlies Whakatane Ash. The tephra underlying Whakatane Ash, and previously identified as Hinemaiaia Ash (definition of Vucetich & Pullar), is probably Motutere Tephra. Hinemaiaia Tephra has a mean age of old (T½) c. 4500 years, Whakatane Ash c. 4800 years. New ¹⁴C dates, obtained on peat or gyttja adjacent to these tephras, are (old T1/2, years B.P.): 4220 ± 60 (NZ316OA), 4490 ± 70 (Wk541)( above Hinemaiaia Tephra); 4470 ± 70 (Wk542) (below Hinemaiaia Tephra); 4800 ± 50 (NZ3161A), 4490 ±60 (Wk496), 4530 ± 60 (Wk497), 4260 ± 140 (Wk662) (below Hinemaiaia Tephra and above Whakatane Ash); 5210 ± 80 (NZ3162A), 4860 ±70 (Wk501), 4850 ± 80 (Wk660) (below Whakatane Ash). Based on the distal occurrences described here, the Hinemaiaia Tephra has a much more wide spread distribution than previously demonstrated, and may have been emplaced by a very powerful "above average" plinian eruption.en_NZ
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.relation.urihttp://www.royalsociety.org.nz/publications/journals/nzjg/en_NZ
dc.rightsThis article has been published in the journal: New Zealand Journal of Geology and Geophysics. © Crown copyright 1986. Used with permission.en_NZ
dc.subjectHinemaiaia Tephra Formationen_NZ
dc.subjectHinemaiaia Ash Formationen_NZ
dc.subjectWhakatane Ash Formationen_NZ
dc.subjectpyroclasticsen_NZ
dc.subjectHoloceneen_NZ
dc.subjectstratigraphyen_NZ
dc.subjecttephrostratigraphyen_NZ
dc.subjectorganic matteren_NZ
dc.subjectC-14en_NZ
dc.subjectisopach mapsen_NZ
dc.subjectglassesen_NZ
dc.subjectchemistryen_NZ
dc.subjectelectron probesen_NZ
dc.subjectexplosive eruptionsen_NZ
dc.titleRevision of the age and stratigraphic relationships of Hinemaiaia Tephra and Whakatane Ash, North Island, New Zealand, using distal occurrences in organic depositsen_NZ
dc.typeJournal Articleen_NZ
dc.identifier.doi10.1080/00288306.1986.10427523
dc.relation.isPartOfNew Zealand Journal of Geology and Geophysicsen_NZ
pubs.begin-page61en_NZ
pubs.elements-id84362
pubs.end-page73en_NZ
pubs.issue1en_NZ
pubs.volume29en_NZ


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