The Upper Ordovician ash beds in the Holy Cross Mountains, as well as the Baltoscandian K-bentonites, appear to be accumulated from pyroclastic material ...
Missing: 542 mudstonesandmudrocks
Twelve samples of mudstones and siliceous shales were taken from the uppermost part of the. Ordovician section at Zalesie Nowe in the Holy Cross Mountains.
Missing: bih= 542 q= mudstonesandmudrocks
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