The Omachi Tephra Formations and Tephrochronology
نویسندگان
چکیده
منابع مشابه
Preservation of thin tephra
The preservation of thin (<300 mm thick) tephra falls was investigated at four sites in Papua New Guinea (PNG), Alaska and Washington, USA. Measurements of the variations in the thickness of: (i) Tibito Tephra 150 km downwind from the source, Long Island (PNG) erupted mid-seventeenth century; (ii) St Helens W tephra (erupted 1479–80 A.D.) on the slopes of the adjacent Mt. Rainier in Washington ...
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Correlations among and identification of source volcanoes for different Late-Glacial and Holocene tephra, preserved in eight lacustrine sediment cores taken from small lakes near Coyhaique (46°S), were made based on the stratigraphic position of tephra in the cores and tephra petrochemistry (glass color and morphology, phenocryst phases, and bulk-tephra trace-element contents determined by ICP-...
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An open-access database has been set up to support the research project studying the ‘Response of Humans to Abrupt Environmental Transitions’ (RESET). The main methodology underlying this project was to use tephra layers to tie together and synchronise the chronologies of stratigraphic records at archaeological and environmental sites. The database has information on occurrences, and chemical c...
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ژورنال
عنوان ژورنال: The Quaternary Research (Daiyonki-Kenkyu)
سال: 1972
ISSN: 1881-8129,0418-2642
DOI: 10.4116/jaqua.11.305