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Contributions to the Neogene radiometric time-scale from northern Africa

Published online by Cambridge University Press:  01 May 2009

D. Vass ,
G. P. Badgasarjan  and
S. Bajanik
D. Vass
Affiliation:
Mlynská dolina 1809 40 BratislavaCzechoslovakia
G. P. Badgasarjan
Affiliation:
Barekamutyan 24375019 ErivanU.S.S.R.
S. Bajanik
Affiliation:
Mlynská dolina 1809 40 BratislavaCzechoslovakia
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Summary

Four volcanic rocks from northern Tunisia and a syntectonic granite from northeastern Algeria were dated by the K—Ar method. The stratigraphic position of the dated rocks is determined mainly by their relationship to biostratigraphically calibrated Miocene tectonism. The K—Ar age of the granite, which is younger than latest Burdigalian and older than Early Tortonian, is 16.8 m.y. (*15.8 m.y. calculated with western decay constants). Rhyodacite at 10.9 (*10.4), rhyolite at 8.8 (*8.3), basalt at 7.3 (*6.9) and adesite at 7.0 (*6.7) m.y. are all apparently younger than Lower Tortonian.

Type
Articles
Information
Geological Magazine , Volume 111 , Issue 2 , March 1974 , pp. 149 - 155
Copyright
Copyright © Cambridge University Press 1974

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