Abstract
AbstractCover beds on uplifted Quaternary marine terraces in the Taranaki-Wanganui area of New Zealand include organic deposits which yield abundant pollen. In the west at Ohawe, marine shore platform deposits are overlain by laterally extensive lignites and laharic breccia, interbedded with alluvium and capped by tephra-rich loess. Following a time of presumably interglacial marine deposition on the platform, a long period of glacial climate is suggested by pollen floras dominated by grass and shrubland taxa. Trees were sparse, but the abundance of podocarps, Nothofagus, and tree ferns increased during at least one interval, suggesting minor climatic amelioration. Near the top of the section, a major change in regional vegetation is recorded by a dominance of pollen derived from podocarp-hardwood forest taxa, including Ascarina, interpreted as indicating a fully interglacial climate. The marine platform, previously assigned to oxygen isotope substage 5e, is now placed in stage 7. The overlying deposits were deposited during glacial stage 6, while interglacial substage 5e is recorded by sediment and pollen assemblages near the top of the section.
Publisher
Cambridge University Press (CUP)
Subject
General Earth and Planetary Sciences,Earth-Surface Processes,Arts and Humanities (miscellaneous)
Reference32 articles.
1. Maps and sections of river terraces in the Rangitikei Basin, North Island New Zealand. 4 sheets;Milne;New Zealand Soil Survey Report,1973
2. Tree-ring dating of recent volcanic ash and Lapilli, Mt Egmont
3. Climate and Sea Level During Oxygen Isotope Stage 7b: On-Land Evidence from New Zealand
4. The historical ecology of the indigenous forest of the Taranaki upland;Nicholls;New Zealand Journal of Forestry,1956
Cited by
23 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献