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Proximal stratigraphy and event sequence of the c. 5600 cal. yr BP Whakatane rhyolite eruption episode from Haroharo volcano, Okataina Volcanic Centre, New Zealand
- Source :
- Scopus-Elsevier
- Publication Year :
- 2005
- Publisher :
- Informa UK Limited, 2005.
-
Abstract
- The c. 5600 cal. yrBP Whakatane eruption episode consisted of a sequence of intracaldera rhyolite eruptions from at least five vents spread over 11 km of the Haroharo linear vent zone within Okataina Volcanic Centre. Initial vent‐opening eruptions from the Haroharo vent produced coarse lithic clast “blast beds” and pyroclastic density currents (surges). These were immediately followed by eruption of very mobile pumiceous pyroclastic surges from the Makatiti vent 6 km to the southwest. Major plinian eruptions from the Makatiti vent then dispersed Whakatane Tephra pumice fall deposits (bulk volume c. 6 km3) across the northeastern North Island while smaller explosive eruptions produced pyroclastic flows and falls from the Haroharo‐Rotokohu vents and at the Pararoa vent on the caldera rim 11 km northeast from Makatiti. The pyroclastic eruptions at all vents were followed by the extrusion of lava flows and domes; extruded lava volumes ranged from 0.03 km3 for the Pararoa dome to 7.5 km3 for the Makat...
Details
- ISSN :
- 11758791 and 00288306
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- New Zealand Journal of Geology and Geophysics
- Accession number :
- edsair.doi.dedup.....bfd862330ae2c60e30ad7ec21e192d0c
- Full Text :
- https://doi.org/10.1080/00288306.2005.9515127