Stratigraphic relations of the Shakopee dolomite and the St. Peter sandstone in southwestern Wisconsin

Geology of the Cuba City, New Diggings, and Shullsburg quadrangles, Wisconsin and Illinois

“…Survey files at Wisconsin Inst. Technology, Platteville, Wis.), and Heyl, Lyons, and Agnew (1951), include the interbedded sandstone, shale, and dolomite in the St. Peter Sandstone; Flint (1956) places these rocks in the Prairie du Chien Group.…”

“…Trowbridge (1917) and Willman and Templeton (1952) report the local abrupt changes in thickness are due to filling by the St. Peter Sandstone of stream channels cut into the top of the Prairie du Chien Group. Flint (1956) believes some of the abrupt changes in thickness are caused by sand that was deposited in depressions caused by solution of carbonate rock of interreef areas in the Prairie du Chien.…”

Geology of the Dubuque South quadrangle, Iowa-Illinois

“…E. Flint (1956) suggest that in the mining district this contact, represents sand deposition on a sea floor made uneven by differential compaction of lime muds over rigid reef masses. The relief of this surface was accentuated by subsequent intrastratal solution and slumping in the interreef zones (Flint, 1956). The Platteville formation was named by Bain (1905, p. 18-19) for outcrops near Platteville, Wis.…”

“…Bain (1906, p. 18 A. E. Flint (1956) suggest that in the mining district this contact, represents sand deposition on a sea floor made uneven by differential compaction of lime muds over rigid reef masses.…”

Geology of the Platteville quadrangle, Wisconsin

“…The other well cuttings show an anomalous combination of red and green shale, sandstone, chert, silicified limestone, and limestone at the stratigraphic position of the Prairie du Chien group. These strata have been considered a part of the Prairie du Chien (Flint, 1956) or the basal part of the overlying St. Peter sandstone (Heyl and others, 1951, p. 15).…”