Figure 8: Triangle classification Cao, SiO2 and Al2O3 of purple shale (black points) in comparison with classification of CORBS Neuhuber and Wagreich, 2011). AC=average carbonate; DC= deep sea carbonate; DSC=deep sea clay; AS= average shale; Austria: Bra= Brandenberg; Reh= Rehkogelgraben; Bu= Buchberg; Greece: BP=Plaka; Bk= Karpeneion; New Zealand: MAN= Manganotone; Flysch Carpathians: TRZ= Trzemesnia, MAZ= Mazak; Italy: V= Vispi.