Fig. 14--Photomicrographs of Black River porosity and diagenesis.

1,2. Dolomitized wackestone (1) with some intercrystalline porosity. Fluorescent photomicrograph (2) of same view of the thin section. Bright, pinpoint clusters are liquid hydrocarbon fluid inclusions in dolomite crystals. These are secondary inclusions because they occur in linear bands cross-cutting the diagenetic fabric of sample 1, PPL. Humble Riley No. 2, 4235 ft.

3. Moldic pore (p) in a dolomitized wackestone. PPL. Consumers Power Co. No. 204, 4512 ft.

4. Moldic pore (p) and intercrystalline porosity infilled slightly with dolomite. Dolomitized wackestone. PPL. Consumers Power Co. No. 204, 4571 ft.

5. Vug (v) partially infilled with dolomite and quartz (q). Consumers Power Co. No. 204, 4512 ft.

6. Residual hydrocarbons in vug (white). PPL. 204, 4571 ft. Consumers Power Co. No. 204, 4571 ft.