Figure 9. QFL ternary plot of Cenozoic very fine sand detrital modes (see Table 2 for values). Polygons represent the fields of variation (standard deviations) about mean values (solid circles) for various epochs. The pattern of distribution of means has been reproduced to the left of the ternary plot to better outline compositional shifts through time (arrows). E = Eocene; O = Oligocene; M = Miocene; Pl = Pliocene; P = Pleistocene. Star = mean value for Leg 103 Cretaceous sandstones from Johnson (1988).