Other
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..95..226w&link_type=abstract
Earth and Planetary Science Letters, Volume 95, Issue 3-4, p. 226-234.
Other
35
Scientific paper
The age of silicic tephra beds that have experienced a simple thermal history can be accurately and precisely determined by application of the isothermal plateau fission-track technique to hydrated glass shards. Age estimates obtained by this means compare very well with those based on co-existing mineral phases using the K-Ar, 40Ar/39Ar, external detector fission-track and thermoluminescence techniques. This concordance contradicts the popular belief that hydrated glass shards give unreliable ages.
Distal tephra beds-many of which are difficult to date because of their fine grainsize, low abundance of crystals and common presence of detrital grains-are readily dated by the isothermal plateau glass-fission-track method. This new advance should greatly facilitate the development of detailed chronologies of tephra-bearing sedimentary sequences located far from volcanic centres.
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