Biblioteca IFEA
Biblioteca IFEA

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1.
An appalachian isochron : a kaolinized Carboniferous air-fall volcanic-ash deposit (tonstein) by
Material type: Article Article; Format: print
Language: Eng In: Geological Society of America bulletin 104(11), 1992, p. 1515-1527: : ill., graph., tab., rés.(Angl)
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2.
The Pennsylvanian Fire Clay tonstein of the Appalachian basin : Its distribution, biostratigraphy, and mineralogy discussion and reply by
Material type: Article Article; Format: print
Language: Eng In: Geological Society of America bulletin 108(1), 1996, p. 120-125: : carte
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