Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><SPAN>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. </SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Copyright Text: 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.