Fig. 11From: K-feldspar rich shales from Jurassic bedded cherts in southeastern SloveniaA–CN–K and CNK–FM–A diagrams (Nesbitt and Young 1989) showing the Izvir samples’ position out of the predicted weathering paths of andesite or granite. Their position corresponds to diagenetic potassium enrichment. Symbols: A Al2O3, C CaO, N Na2O, K K2O, F FeOtotal, M MgO, samples same as in Fig. 4 Back to article page