Pg. 147. Arcadia member of Trempealeau formation. Consists of 3-foot basal bed of edgewise conglomerate, flat pebbles of buff siltstone in a greensand matrix, that grades upward into lenticular strata of varied lithology, dominantly dolomitic siltstone. Thickness about 20 feet. Underlies St. Lawrence member; unconformably overlies Bad Axe member, Franconia sandstone. [Age is Late Cambrian (Croixan).]
Type locality: in roadcut and small quarry on State Highway 93, 1 mi east of Arcadia, Trempealeau Co., western WI. Continuously extensive north of Black River Valley in western WI and eastern MN.

Source: US geologic names lexicon (USGS Bull. 1200, p. 125).

Pg. 174-175. Arcadia member of Trempealeau formation. In basinward exposures, strata of Lodi member of St. Lawrence vertically succeed Black Earth dolomite member. Elsewhere Lodi occurs beneath Black Earth member as well as above it. At Arcadia, these strata beneath the dolomite are regarded by Raasch (1952) as type Arcadia member of Trempealeau. Except for content of OSCEOLIA fauna, on which basis they were designated Arcadia member, these beds do not differ from strata above the dolomite. [Age is Late Cambrian (Croixan).]

Source: US geologic names lexicon (USGS Bull. 1200, p. 125).