|Mt. Simon Formation, Michigan Basin and Ohio Area
In cores and cuttings of the Mt. Simon sandstone in the subsurface of Michigan and from outcrops in adjacent areas, the rock is a feldspathic quartzose sandstone, and most is arkose. "Many of the quartz and feldspar grains have authigenic overgrowths of secondary-mineral cement." (Briggs, 1968; p.141). However, one should keep in mind that Briggs had a very small data set to choose from. The outcrop observations of Driese and others (1981) (that the Mt. Simon is a quartz arenite) must be taken into account as well. Nonetheless, Briggs (1968) provided a table of rock mineralogy from the Consumers Power Company Brine Disposal No. 139, and we have included it in our analysis.
Briggs, L. I., 1968, Geology of subsurface waste disposal in Michigan Basin, in Galley, J. E., ed., Subsurface disposal in geologic basins-a study of reservoir strata: American Association of Petroleum Geologists Memoir 10, p. 128-153.