A Petrographic Study of the Three Forks Formation (Upper Devonian), Williston Basin, North Dakota: Based on Thin Section Analysis, XRD and SEM
Figure 6
SEM photomicrographs of the Three Forks showing the distribution of very fine to medium crystalline dolomite rhombs (Dol) and small, disc shaped authigenic hematite cements (H) in all samples (a, b, c). The intercrystalline (Ixl, A: E4, N5) porosity is mainly obstructed by the precipitation of anhedral to subhedral dolomite rhombs and subordinately by hematite cements.
