A Petrographic Study of the Three Forks Formation (Upper Devonian), Williston Basin, North Dakota: Based on Thin Section Analysis, XRD and SEM
Figure 5
Photomicrographs of lithofacies 4. (a) x50ppl, very fine to medium crystalline dolomite rhombs surrounded by deep red hematite cement plus minor amounts of clasts; (b, c, d) x400ppl, ferroan and nonferroan subhedral (F Dol, Dol 2) and euhedral (Dol 3) dolomite rhombs and monocrystalline quartz.
