VALE PRE-GLACIAL A NORDESTE DE JUNDIAÍ, S. P.

HENNO MARTIN, HENRY MAU, ALFREDO J. S. BJORNBERG

Resumo


A small sedimentary basin occurs in schists of the pre-Cambrian São Roque series, 12 km northeast of Jundiaí, state of São Paulo. Glacial and peri-glacial sediments (tillites and varvites) belonging to the Itararé group of the Tubarão series (Upper Carboniferous) were found in the basin. The sediments are shown to be the filling of a pre-glacial valley, oriented about N55W. An angular unconformity and a fossil soil separate these sediments from overlying siltstones.

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