Sandstone framework composition displayed in QFL ternary diagram
The overall variation within the ternary total quartz–
feldspar–lithoclast diagram (QFL, Fig. 3 ) is strongly
dependent on the stratigraphic position of the arenites.
27% corresponding to as much as 70% in QFL proportions, Fig.
3 ), and some Upper Santonian to lowermost Campanian (top
Heidelberg Fm according to Fig. 4 , Heimburg Fm, and
Blankenburg Fm) arenites are characterized by relatively high
feldspar quantities (max.
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