1966/03/01 by A. P. Druce · 7 citations
Agricultural and Biological Sciences · Earth and Planetary Sciences · #Geological formations and processes #Geology and Paleoclimatology Research #Plant Diversity and Evolution
paper · pdf · doi:10.1080/0028825x.1966.10443951
crossref issued 1966/03/01 · crossref published 1966/03/01 · crossref published-print 1966/03/01 · openalex publication_date 1966/03/01 · crossref published-online 2012/08/01 · crossref created 2012/08/01 · openalex created_date 2025/10/10 · crossref deposited 2026/01/25 · crossref indexed 2026/07/27 · openalex updated_date 2026/07/28
Summary Previous literature on the recent volcanic history of Mt Egmont is reviewed. In the present account nine beds, constituting the volcanic ash and lapilli deposited on the mountain within the last 500 years, are described, mapped, and approximately dated. In stratigraphic sequence these are: Newall Ash, Newall Lapilli, Waiweranui Lapilli, Waiweranui Ash, constituting the Newall Formation dated about A.D. 1604; Burrell Ash, Burrell Lapilli, Puniho Lapilli 1, Puniho Lapilli 2, constituting the Burrell Formation dated about A.D. 1655; and Tahurangi Ash, the sole member of the Tahurangi Formation dated about A.D. 1755. The dating is based on tree‐ring counts for the most part, but relative depths of interbedded peat have also been used. Sources of error in tree‐ring dating and the problems involved in applying the method to the particular ash beds are discussed in detail. The recent volcanic history of the mountain is outlined. Further study needs to be made of the beds on the west side to elucidate the history of the numerous showers directed there.