Holocene sediments and vertical tectonic downwarping near wairoa, Northern Hawke's Bay, New Zealand

Yoko Ota, K. R. Berryman, L. J. Brown, Kaoru Kashima

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Depositional environments for Holocene terrestrial, estuarine, and marine sediments on the Wairoa River floodplain at Wairoa and coastal plain east of Wairoa, were determined from an analysis of stratigraphy, lithologies, and diatom assemblages obtained from auger holes and foundation and water-well drillholes. The sediments were deposited during the postglacial sea-level rise which started sometime prior to c. 9200 years ago and ended at c. 4000 years ago, when the shoreline was at least 2 km landward of the present position, and a ria-like morphology had developed at the innermost edge of the present-day coastal plain. The postglacial marine sediments usually occur slightly below the present sea level (down to -4 m a.m.s.l.) indicating net tectonic subsidence during the Holocene. Other evidence suggests that this tectonic subsidence may extend back into the middle Pleistocene.

Original languageEnglish
Pages (from-to)333-341
Number of pages9
JournalNew Zealand Journal of Geology and Geophysics
Volume32
Issue number3
DOIs
Publication statusPublished - Jul 1 1989

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geology
  • Earth and Planetary Sciences (miscellaneous)

Fingerprint Dive into the research topics of 'Holocene sediments and vertical tectonic downwarping near wairoa, Northern Hawke's Bay, New Zealand'. Together they form a unique fingerprint.

Cite this