Pg. vi (chart), 8-12. Eau Galle Member of Pierce Formation. (Follows the informal usage of R.W. Baker, 1984, Wisconsin Geol. Nat. Hist. Survey Gdbk., no. 11.) Yellowish-brown to gray, unbedded, noncalcareous silty and clayey glacial lake sediment. Occurs in subsurface. Base not observed thus thickness unknown; at type section exceeds 8 m. Is overlain by Woodville Member (new) of Pierce Formation; contact is abrupt and sharp. Underlying unit unknown. Readily distinguished from till of Hersey and Woodville Members of Pierce Formation by conspicuous lack of clasts and fine grain size, and from Kinnickinnic Member of Pierce Formation by abundance of clay, montmorillonite, and by scarcity of kaolinite. Probably deposited in proglacial lakes dammed by glacier that deposited Woodville Member. Age is considered Pleistocene (pre-Illinoian), based on stratigraphic position.
Type section (subsurface; =Woodville Member type section): drillhole at reference section for the Hersey Member, along Chicago and Northwestern RR in town of Woodville, in SE/4 NW/4 NW/4 sec. 35, T. 29 N., R. 16 W., [approx. Lat. 44 deg. 57 min. 26 sec. N., Long. 92 deg. 17 min. 43 sec. W.], Baldwin East 7.5-min quadrangle, St. Croix Co., western WI.
Named from Eau Galle River in St. Croix, Pierce, and Dunn Cos., western WI; name credited to Robert W. Baker.
[Additional locality information from USGS historical topographic map collection TopoView, accessed on June 9, 2018.]

Source: Publication.

[Not synopsized to date. Lithology, thickness, distinguishing characteristics, contacts, sections, areal extent, age, correlations discussed.]
Pg. 4 (fig. 2), 7 (fig. 3), 8, 20-21. Eau Galle Member of Pierce Formation.

Source: NA