Fig. 5.
Histograms illustrating the pattern of abundance and dominance in Markley Fm macrofossils by facies type. Species order on the x-axis is the same in (a), (c), (e) and (g). In (b), (d), (f) and (h), species are ordered by dominance along the x-axis. Letters to the side indicate the facies type: K, kaolinite-dominat ed siltstone (18 taxa, sample size 356) ; F, coarsening upward, interbedded siltstones and sandstones (25 taxa, sample size 1210);P, mudstoneparting beds (16 taxa, sample size 696); O, organic shales (15 taxa, sample size 915).