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On the age and morphology of the reunion event
Author(s) -
Baksi Ajoy K.,
Hoffman Kenneth A.
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl008536
Subject(s) - polarity (international relations) , geology , event (particle physics) , k–ar dating , morphology (biology) , feature (linguistics) , paleontology , chemistry , physics , astrophysics , biochemistry , linguistics , philosophy , cell
Data pertinent to the age of the normal polarity Reunion “Event” (or subchron), and whether it is a split feature, are critically examined. New 40 Ar/ 39 Ar age determinations on lavas from two sequences on Reunion Island, along with available potassium‐argon (K‐Ar), 40 Ar/ 39 Ar and astrochronological analyses, indicate an age of 2.15–2.13 Ma. Although the possibility cannot be completely ruled out, at present there is no convincing evidence supporting the contention of a short duration of normal polarity some 70–90 kyr later.