Geologic Unit: Crab Lake

Usage:

Crab Lake Member of Copper Falls Formation (MI,WI)

Geologic age:

Quaternary (Pleistocene; Wisconsinan)

Type section, locality, area and/or origin of name:

Type section: roadcut (fresh in 1981) on east side of Crab Lake Road, about 75 m south of County Trunk Highway B, [about 1 mi southeast of village of Presque Isle], in NW/4 NW/4 NW/4 sec. 2, T. 43 N., R. 6 E., [approx. Lat. 46 deg. 14 min. 27 sec. N., Long. 89 deg. 43 min. 15 sec. W.], Presque Isle quadrangle, Vilas Co., northern WI (Attig and others, 1988; see Syverson and others, 2011).
Named from Crab Lake, Vilas Co., northern WI; name credited to John W. Attig (Attig and others, 1988; see Syverson and others, 2011).
Reference section: in (fresh face, 1981) small gravel pit on west side of dirt road, 0.6 mi (1 km) northwest of intersection of Helen Creek and County Trunk Highway B, in NE/4 SE/4 NW/4 sec. 19, T. 43 N., R. 9 E., [approx. Lat. 46 deg. 11 min. 40 sec. N., Long. 89 deg. 25 min. 12 sec. W.], Thousand Island Lake 7.5-min quadrangle, Vilas Co., northern WI (Attig and others, 1988; see Syverson and others, 2011).

AAPG geologic province:

Wisconsin arch