Florida Geological Survey Figure 8. The most abundant rock fragments present within both the Denkman Member and red bed lithofacies are low-rank metamorphic grains (LR) possibly having several different origins. Crossed-nicols; upper Denkman Member; 16617.0 feet; Jenkins Oil & Gas Inc., Haynes 8-1; Florida permit 1128; Bar scale = 0.1 mm. 104