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40Ar/39Ar ages of tonstein and tuff sanidines: New calibration points for the improvement of the Upper Carboniferous time scale

✍ Scribed by Jürgen C Hess; Hans J Lippolt

Book ID
113290408
Publisher
Elsevier Science
Year
1986
Weight
937 KB
Volume
59
Category
Article
ISSN
0168-9622

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The Fire Clay tonstein [Pennsylvanian (Upper Carboniferous), Westphalian Series, Duckmantian Stage]-a kaolinized, volcanicash deposit occurring in Kentucky, West Virginia, Tennessee, and Virginia-is the most widespread bed in the Middle Pennsylvanian of the central Appalachian basin, USA. A concorda